{"title":"BEYOND STUCR STUCL Internal Boring Bar","description":"\u003cstyle\u003e\n.th-wrap { font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, sans-serif; color: #2b2b2b; line-height: 1.65; max-width: 1080px; margin: 0 auto; }\n.th-wrap * { box-sizing: border-box; }\n.th-wrap h1 { font-size: 30px; color: #003478; border-bottom: 3px solid #003478; padding-bottom: 12px; margin-bottom: 22px; font-weight: 700; line-height: 1.25; }\n.th-wrap h2 { font-size: 24px; color: #003478; margin-top: 38px; padding-left: 14px; border-left: 6px solid #003478; font-weight: 700; line-height: 1.25; }\n.th-wrap h3 { font-size: 18px; color: #1a1a1a; margin-top: 22px; font-weight: 700; }\n.th-wrap h4 { font-size: 15px; color: #555; text-transform: uppercase; letter-spacing: .04em; font-weight: 700; margin: 0 0 6px; }\n.th-wrap p { margin: 0 0 14px; }\n.th-wrap a { color: #003478; text-decoration: none; border-bottom: 1px dotted #003478; }\n.th-wrap a:hover { color: #1a1a1a; border-bottom-color: #1a1a1a; }\n.th-wrap ul, .th-wrap ol { padding-left: 24px; margin: 0 0 16px; }\n.th-wrap li { margin: 4px 0; }\n.th-section { background: #e6eef7; padding: 26px 28px; border-radius: 8px; margin: 24px 0; border: 1px solid #c8d8e8; }\n.th-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 18px 0; }\n.th-card { background: #fff; border: 1px solid #e0d4d4; border-radius: 8px; padding: 14px 16px; transition: transform .15s; }\n.th-card:hover { transform: translateY(-2px); box-shadow: 0 4px 10px rgba(0,52,120,.08); }\n.th-card .price { color: #1a1a1a; font-weight: 700; font-size: 14px; margin-top: 6px; }\n.th-card .meta { color: #666; font-size: 12px; margin-top: 4px; }\n.th-stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 18px 0; }\n.th-stat { background: #fff; border: 1px solid #e0d4d4; border-radius: 8px; padding: 14px; text-align: center; }\n.th-stat .num { font-size: 26px; font-weight: 800; color: #003478; line-height: 1; }\n.th-stat .label { font-size: 12px; color: #555; margin-top: 6px; }\n.th-table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }\n.th-table th, .th-table td { padding: 10px 12px; border: 1px solid #e0d4d4; text-align: left; }\n.th-table th { background: #003478; color: #fff; font-weight: 600; }\n.th-table tr:nth-child(even) td { background: #e6eef7; }\n.th-cta { background: #003478; color: #fff; padding: 28px; border-radius: 8px; text-align: center; margin: 28px 0; }\n.th-cta a { color: #ffd86b; border-bottom-color: #ffd86b; font-weight: 600; }\n.th-cta h2 { color: #fff; border-left-color: #ffd86b; padding-left: 14px; }\n.th-code { font-family: 'Consolas', 'Courier New', monospace; background: #f5f5f5; padding: 2px 6px; border-radius: 3px; font-size: 13px; color: #003478; }\n.th-warn { background: #fff0f0; border: 2px solid #d32f2f; padding: 22px 26px; border-radius: 8px; margin: 24px 0; }\ndetails { background: #fff; border: 1px solid #e0d4d4; border-radius: 8px; padding: 12px 16px; margin: 10px 0; }\ndetails summary { font-weight: 600; color: #003478; cursor: pointer; padding: 4px 0; }\ndetails[open] summary { margin-bottom: 8px; }\ndetails p { margin: 8px 0; color: #2b2b2b; }\n\u003c\/style\u003e\n\u003cdiv class=\"th-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv style=\"background: #e6eef7; padding: 32px 28px; border-radius: 10px; border: 1px solid #c8d8e8; margin-bottom: 24px;\"\u003e\n    \u003ch1 style=\"color: #003478; border-bottom: 3px solid #003478; padding-bottom: 12px; margin-bottom: 18px; font-size: 30px; font-weight: 700;\"\u003eBEYOND STUCR STUCL Internal Boring Bar — 93° Approach Angle (U Code)\u003c\/h1\u003e\n    \u003cp style=\"font-size: 16px; color: #1a1a1a; margin: 0 0 14px;\"\u003eBEYOND STUCR\/L Internal Boring Bars — Screw-Clamp Round-Shank Holders with 93° Approach Angle for TCMT\/TCGT Inserts\u003c\/p\u003e\n    \u003cp style=\"font-size: 15px; color: #1a1a1a; margin: 0 0 8px;\"\u003e27 BEYOND STUCR STUCL Internal Boring Bar SKUs Across 4 Shank Diameters (16\/20\/25\/32 mm) with 93° Approach Angle (U Code)\u003c\/p\u003e\n\n    \u003cdiv class=\"th-stat-grid\"\u003e\n      \u003cdiv class=\"th-stat\"\u003e\n\u003cdiv class=\"num\"\u003e27\u003c\/div\u003e\n\u003cdiv class=\"label\"\u003eBEYOND Boring Bar SKUs\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"th-stat\"\u003e\n\u003cdiv class=\"num\"\u003e2\u003c\/div\u003e\n\u003cdiv class=\"label\"\u003eUnique 5-Letter Codes\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"th-stat\"\u003e\n\u003cdiv class=\"num\"\u003e9\u003c\/div\u003e\n\u003cdiv class=\"label\"\u003eShank Diameters (mm)\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"th-stat\"\u003e\n\u003cdiv class=\"num\"\u003e7\u003c\/div\u003e\n\u003cdiv class=\"label\"\u003eLength Codes\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"margin: 18px 0 0; font-size: 14px; color: #555;\"\u003eBrowse the \u003ca href=\"\/collections\/stucr-l-internal\"\u003efull BEYOND Screw-On System Boring Bar catalog\u003c\/a\u003e, or jump to:\n      \u003ca href=\"#about\"\u003eAbout\u003c\/a\u003e · \u003ca href=\"#shank-spec\"\u003eShank Spec Decode\u003c\/a\u003e · \u003ca href=\"#code-table\"\u003e5-Letter Code Reference\u003c\/a\u003e · \u003ca href=\"#all-products\"\u003eAll Products\u003c\/a\u003e · \u003ca href=\"#faq\"\u003eFAQ\u003c\/a\u003e.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- BORING BAR VS EXTERNAL DIFFERENTIATION --\u003e\n  \u003cdiv class=\"th-warn\"\u003e\n    \u003ch2 style=\"color: #d32f2f; border-left: 6px solid #d32f2f; padding-left: 14px; margin-top: 0;\"\u003e🔍 Internal Boring Bar vs External Turning Holder — Critical Differences\u003c\/h2\u003e\n    \u003cp style=\"font-size: 15px; color: #5a0000;\"\u003eBoring bars (internal turning tool holders) and external turning holders have \u003cstrong\u003edifferent shank specifications\u003c\/strong\u003e but share the same ISO 1832 5-letter insert interface code.\u003c\/p\u003e\n    \u003ctable class=\"th-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eExternal Turning Holder\u003c\/th\u003e\n\u003cth\u003eInternal Boring Bar (this catalog)\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank shape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSquare (mm × mm)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eRound (single mm diameter)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePosition 2-3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShank height × width (e.g. 2525 = 25×25 mm)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eShank diameter (e.g. 06 = 6 mm round)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePosition 4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShank length code (H\/K\/M\/P\/Q)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eShank length code\u003c\/strong\u003e (H\/J\/K\/M\/Q) — typically shorter than external\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 \/ 20 \/ 25 \/ 32 mm square\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e6 \/ 8 \/ 10 \/ 12 \/ 16 \/ 20 \/ 25 \/ 32 mm round\u003c\/strong\u003e (smaller for small holes)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePosition 5\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShank width (mm)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSeparator \"-\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePosition 6-10 (5-letter code)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClamp + Shape + Approach + Relief + Hand\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eSame 5-letter code\u003c\/strong\u003e (SCLCR \/ SDJCR \/ STUBR etc.)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsert IC code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 \/ 16 \/ 19 \/ 22 \/ 25 mm (larger)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e06 \/ 07 \/ 08 \/ 09 \/ 11 \/ 12 mm\u003c\/strong\u003e (smaller for small holes)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptional -A## suffix\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eMinimum bore diameter\u003c\/strong\u003e (e.g. A12 = 12 mm min bore, for stepped \/ anti-vibration bars)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTurning the OUTER diameter of workpiece\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eTurning the INNER diameter\u003c\/strong\u003e (boring a hole from inside)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsert side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInsert's top rake faces OUTWARD on the shank's top\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eInsert's top rake faces INWARD\u003c\/strong\u003e — chip flow goes UP\/OUT through the bore\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoolant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOften without\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eCoolant-through is standard\u003c\/strong\u003e for chip evacuation\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003cp style=\"font-size: 13px; color: #5a0000; margin-bottom: 0;\"\u003e\u003cstrong\u003eCritical note:\u003c\/strong\u003e A boring bar and an external turning holder with the same 5-letter code (e.g. SCLCR) have \u003cstrong\u003edifferent shank diameters and lengths\u003c\/strong\u003e. They are NOT interchangeable — you cannot use a boring bar on an external turning job, nor an external holder inside a bore.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- BEYOND AUTHENTICITY --\u003e\n  \u003cdiv class=\"th-section\" style=\"background: #fff8e1; border: 1px solid #ffa000;\"\u003e\n    \u003ch2 style=\"color: #b07000; border-left-color: #ffa000;\"\u003eBEYOND-Original Boring Bars from Hangzhou, China\u003c\/h2\u003e\n    \u003cp\u003eAll 27 boring bars in this catalog are \u003cstrong\u003e100% genuine BEYOND\u003c\/strong\u003e — manufactured by BEYOND in Hangzhou, China. Each boring bar is CNC-machined from premium alloy steel (DIN 1.3343 \/ AISI M2 equivalent), heat-treated to HRC 60-62, and precision-ground for shank and pocket tolerances within ±0.01mm. Most boring bars include \u003cstrong\u003einternal coolant channels\u003c\/strong\u003e (coolant-through design) for efficient chip evacuation during deep boring operations. Many models feature \u003cstrong\u003eanti-vibration damping\u003c\/strong\u003e for chatter-free boring at overhangs up to 6× shank diameter.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ABOUT --\u003e\n  \u003cdiv class=\"th-section\"\u003e\n    \u003ch2 id=\"about\"\u003eAbout BEYOND Screw-On System Boring Bars\u003c\/h2\u003e\n    \u003cp\u003e\u003cstrong\u003eBoring bars (internal turning tool holders)\u003c\/strong\u003e are designed to reach inside a pre-existing hole and enlarge it or finish the inner surface to a precise diameter. They have \u003cstrong\u003eround shanks\u003c\/strong\u003e (not square like external holders) so they can fit through the bore opening, and they typically feature \u003cstrong\u003einternal coolant channels\u003c\/strong\u003e for chip evacuation through the bar itself.\u003c\/p\u003e\n    \u003cp\u003eThis catalog contains \u003cstrong\u003e27 BEYOND boring bar SKUs\u003c\/strong\u003e across 2 unique 5-letter codes, 9 shank diameter options, and 7 length codes. All holders are screw-clamp (the dominant clamping system for boring bars) with standard ISO 1832 5-letter insert interface codes.\u003c\/p\u003e\n\n    \u003cp\u003e\u003cstrong\u003eBEYOND 9-Position Boring Bar Code Structure (per official catalog):\u003c\/strong\u003e\u003c\/p\u003e\n    \u003ctable class=\"th-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003ePosition\u003c\/th\u003e\n\u003cth\u003eSymbol\u003c\/th\u003e\n\u003cth\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003eS\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eBoring bar round-shank indicator\u003c\/strong\u003e — the \"S\" prefix designates a round-shank boring bar (vs. square-shank external holder). Internal coolant-through design is standard.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2-3\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003e06 · 08 · 10 · 12 · 16 · 20 · 25 · 32\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eShank diameter (mm)\u003c\/strong\u003e — single mm value (round shank, not height×width). Smaller diameters (06\/08\/10) are for tight bores; larger (25\/32) for heavy roughing.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003eH · J · K · M · N · Q · R · S\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eShank length code\u003c\/strong\u003e — 24 letters A-Y encoding 32-500mm. Common boring bar lengths: \u003cspan class=\"th-code\"\u003eH\u003c\/span\u003e=100mm \/ \u003cspan class=\"th-code\"\u003eJ\u003c\/span\u003e=110mm \/ \u003cspan class=\"th-code\"\u003eK\u003c\/span\u003e=125mm \/ \u003cspan class=\"th-code\"\u003eM\u003c\/span\u003e=150mm \/ \u003cspan class=\"th-code\"\u003eQ\u003c\/span\u003e=180mm \/ \u003cspan class=\"th-code\"\u003eR\u003c\/span\u003e=200mm.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003e-\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eSeparator dash\u003c\/strong\u003e between shank spec and 5-letter code.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e6-10\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003eS · M · C · D · P · A · W\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e5-letter ISO 1832 code (same as external holders)\u003c\/strong\u003e — Pos 6 = clamping mode, Pos 7 = insert shape, Pos 8 = approach angle, Pos 9 = relief angle, Pos 10 = hand direction.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003e06 · 07 · 08 · 09 · 11 · 12\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eInsert IC code\u003c\/strong\u003e — 06 = 6.35mm \/ 07 = 7.94mm \/ 08 = 7.94mm \/ 09 = 9.525mm \/ 11 = 11.0mm \/ 12 = 12.7mm. Boring bars typically use SMALLER inserts than external holders (06\/08\/11 are common for boring).\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e12+\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"th-code\"\u003e-A## (optional)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eMinimum bore diameter code\u003c\/strong\u003e — only present on stepped\/anti-vibration bars. e.g. \u003cspan class=\"th-code\"\u003e-A12\u003c\/span\u003e = 12mm minimum bore diameter.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SHANK SPEC DECODE --\u003e\n  \u003cdiv class=\"th-section\"\u003e\n    \u003ch2 id=\"shank-spec\"\u003eBoring Bar Shank Specification Distribution\u003c\/h2\u003e\n    \u003cp\u003eBEYOND boring bars are available in 9 shank diameters — from 6mm (for tight bores) to 32mm (for heavy roughing). The shank must be smaller than the bore being machined, leaving clearance for chip evacuation on the shank's underside.\u003c\/p\u003e\n    \u003ctable class=\"th-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eShank Diameter\u003c\/th\u003e\n\u003cth\u003eSKU Count\u003c\/th\u003e\n\u003cth\u003eTypical Use Case\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003e8 mm round shank\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~10-16 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e10 mm round shank\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~12-18 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e12 mm round shank\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~14-20 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e14 mm round shank\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~16-22 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e16 mm round shank\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~18-24 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e18 mm round shank\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~20-26 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e20 mm round shank\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~22-28 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e25 mm round shank\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~27-33 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e32 mm round shank\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eFor boring holes as small as ~34-40 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- CODE REFERENCE --\u003e\n  \u003cdiv class=\"th-section\"\u003e\n    \u003ch2 id=\"code-table\"\u003e5-Letter Insert Interface Codes\u003c\/h2\u003e\n    \u003cp\u003eDespite being boring bars (internal), the 5-letter ISO 1832 code follows the same convention as external turning holders. Each card below shows one 5-letter code with its decoding and SKU count.\u003c\/p\u003e\n    \u003cdiv class=\"th-cards\"\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003eSTUCR — Triangle 60°-shape\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eScrew-Clamp + 93°° approach + 7° positive° positive relief + Right-hand\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003e6 SKUs · ISO 1832 TC INSERT\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003eSTUCL — Triangle 60°-shape\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eScrew-Clamp + 93°° approach + 7° positive° positive relief + Left-hand\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003e5 SKUs · ISO 1832 TC INSERT\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- FEATURED PRODUCTS --\u003e\n  \u003cdiv class=\"th-section\"\u003e\n    \u003ch2 id=\"featured\"\u003eFeatured BEYOND Screw-On System Boring Bars\u003c\/h2\u003e\n    \u003cp\u003eTop featured boring bars from this collection — click any to view product details, insert specifications, and add to cart.\u003c\/p\u003e\n    \u003cdiv class=\"th-cards\"\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/products\/beyond-s32t-stucr16-boring-bar-holder-cnc-internal-turning-tcmt\"\u003eBEYOND S32T-STUCR16 Right Hand Internal Turning Tool Holder | 32mm CNC Boring Ba…\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eBEYOND · 300mm boring bar · 32mm shank · 93 degree approach angle\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eS32T-STUCR16\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/products\/beyond-s25s-stucr16-boring-bar-25mm-cnc-internal-turning-tcmt\"\u003eBEYOND S25S-STUCR16 Right Hand Internal Turning Tool Holder | 25mm CNC Boring Ba…\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eBEYOND · 250mm boring bar · 25mm shank · 93 degree approach angle\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eS25S-STUCR16\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/products\/beyond-s25s-stucr11-boring-bar-25mm-cnc-internal-turning-tcmt11\"\u003eBEYOND S25S-STUCR11 Right Hand Internal Turning Tool Holder | 25mm CNC Boring Ba…\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eBEYOND · 250mm boring bar · 25mm shank · 95 degree cutting edge\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eS25S-STUCR11\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/products\/beyond-s25s-stucl16-boring-bar-25mm-cnc-internal-turning-tcmt\"\u003eBEYOND S25S-STUCL16 Left Hand Internal Turning Tool Holder | 25mm CNC Boring Bar\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eBEYOND · 250mm boring bar · 25mm shank · 93 degree approach angle\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eS25S-STUCL16\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/products\/beyond-s25s-stucl11-boring-bar-25mm-cnc-internal-turning-tcmt11\"\u003eBEYOND S25S-STUCL11 Left Hand Internal Turning Tool Holder | 25mm CNC Boring Bar\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eBEYOND · 250mm boring bar · 25mm shank · 95 degree cutting edge\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eS25S-STUCL11\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/products\/beyond-s20r-stucr16-boring-bar-20mm-cnc-internal-turning-tcmt\"\u003eBEYOND S20R-STUCR16 Right Hand Internal Turning Tool Holder | 20mm CNC Boring Ba…\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eBEYOND · 200mm boring bar · 20mm shank · 95 degree cutting edge\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eS20R-STUCR16\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ALL PRODUCTS TABLE (truncated to fit Shopify 64 KB description cap) --\u003e\n  \u003cdiv class=\"th-section\"\u003e\n    \u003ch2 id=\"all-products\"\u003eSample 30 of 27 BEYOND Boring Bar SKUs\u003c\/h2\u003e\n    \u003cp\u003eShowing top 30 boring bars — \u003cstrong\u003eview the complete 27-product catalog at \u003ca href=\"\/collections\/stucr-l-internal\"\u003e\/collections\/stucr-l-internal\u003c\/a\u003e\u003c\/strong\u003e or use the search function for specific codes.\u003c\/p\u003e\n    \u003ctable class=\"th-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eProduct Handle\u003c\/th\u003e\n\u003cth\u003eTitle (preview)\u003c\/th\u003e\n\u003cth\u003eSKU Code\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s32t-stucr16-boring-bar-holder-cnc-internal-turning-tcmt\"\u003ebeyond-s32t-stucr16-boring-bar-holder-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S32T-STUCR16 Right Hand Internal Turning Tool Holder | 32mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS32T-STUCR16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s25s-stucr16-boring-bar-25mm-cnc-internal-turning-tcmt\"\u003ebeyond-s25s-stucr16-boring-bar-25mm-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S25S-STUCR16 Right Hand Internal Turning Tool Holder | 25mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS25S-STUCR16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s25s-stucr11-boring-bar-25mm-cnc-internal-turning-tcmt11\"\u003ebeyond-s25s-stucr11-boring-bar-25mm-cnc-internal-turning-tcmt11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S25S-STUCR11 Right Hand Internal Turning Tool Holder | 25mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS25S-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s25s-stucl16-boring-bar-25mm-cnc-internal-turning-tcmt\"\u003ebeyond-s25s-stucl16-boring-bar-25mm-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S25S-STUCL16 Left Hand Internal Turning Tool Holder | 25mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS25S-STUCL16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s25s-stucl11-boring-bar-25mm-cnc-internal-turning-tcmt11\"\u003ebeyond-s25s-stucl11-boring-bar-25mm-cnc-internal-turning-tcmt11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S25S-STUCL11 Left Hand Internal Turning Tool Holder | 25mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS25S-STUCL11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s20r-stucr16-boring-bar-20mm-cnc-internal-turning-tcmt\"\u003ebeyond-s20r-stucr16-boring-bar-20mm-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S20R-STUCR16 Right Hand Internal Turning Tool Holder | 20mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS20R-STUCR16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s20r-stucl16-boring-bar-20mm-cnc-internal-turning-tcmt\"\u003ebeyond-s20r-stucl16-boring-bar-20mm-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S20R-STUCL16 Left Hand Internal Turning Tool Holder | 20mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS20R-STUCL16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s20r-stucl11\"\u003es20r-stucl11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S20R-STUCL11 Left Hand Internal Turning Tool Holder | 20mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS20R-STUCL11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s18q-stucr11\"\u003es18q-stucr11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S18Q-STUCR11 Right Hand Internal Turning Tool Holder | 18mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS18Q-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s16q-stucr16-boring-bar-16mm-cnc-internal-turning-tcmt\"\u003ebeyond-s16q-stucr16-boring-bar-16mm-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S16Q-STUCR16 Right Hand Internal Turning Tool Holder | 16mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS16Q-STUCR16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s16q-stucr11\"\u003es16q-stucr11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S16Q-STUCR11 Right Hand Internal Turning Tool Holder | 16mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS16Q-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s16q-stucl16-boring-bar-16mm-cnc-internal-turning-tcmt\"\u003ebeyond-s16q-stucl16-boring-bar-16mm-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S16Q-STUCL16 Left Hand Internal Turning Tool Holder | 16mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS16Q-STUCL16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s16q-stucl11\"\u003es16q-stucl11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S16Q-STUCL11 Left Hand Internal Turning Tool Holder | 16mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS16Q-STUCL11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s14n-stucr11\"\u003es14n-stucr11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S14N-STUCR11 Right Hand Internal Turning Tool Holder | 14mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS14N-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s14n-stucl11\"\u003es14n-stucl11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S14N-STUCL11 Left Hand Internal Turning Tool Holder | 14mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS14N-STUCL11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s12m-stucr11-boring-bar-cnc-internal-turning-tool-holder\"\u003es12m-stucr11-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S12M-STUCR11 Right Hand Internal Turning Tool Holder | 12mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS12M-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s12m-stucr09-boring-bar-cnc-internal-turning-tool-holder\"\u003es12m-stucr09-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S12M-STUCR09 Right Hand Internal Turning Tool Holder | 12mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS12M-STUCR09\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s12m-stucl11-boring-bar-cnc-internal-turning-tool-holder\"\u003es12m-stucl11-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S12M-STUCL11 Left Hand Internal Turning Tool Holder | 12mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS12M-STUCL11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s10k-stucr11-boring-bar-cnc-internal-turning-tool-holder\"\u003es10k-stucr11-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S10K-STUCR11 Right Hand Internal Turning Tool Holder | 10mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS10K-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s10k-stucr09-boring-bar-cnc-internal-turning-tool-holder\"\u003es10k-stucr09-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S10K-STUCR09 Right Hand Internal Turning Tool Holder | 10mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS10K-STUCR09\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s10k-stucl11-boring-bar-cnc-internal-turning-tool-holder\"\u003es10k-stucl11-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S10K-STUCL11 Left Hand Internal Turning Tool Holder | 10mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS10K-STUCL11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s10k-stucl09-boring-bar-cnc-internal-turning-tool-holder\"\u003es10k-stucl09-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S10K-STUCL09 Left Hand Internal Turning Tool Holder | 10mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS10K-STUCL09\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s08k-stucr09-boring-bar-tcmt0902-internal-turning-tool-holder\"\u003ebeyond-s08k-stucr09-boring-bar-tcmt0902-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S08K-STUCR09 High-Rigidity 8mm Shank 125mm Length Screw-Down CN…\u003c\/td\u003e\n\u003ctd\u003eS08K-STUCR09\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s08k-stucl09-boring-bar-cnc-internal-turning-tool-holder\"\u003es08k-stucl09-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S08K-STUCL09 Left Hand Internal Turning Tool Holder | 8mm CNC B…\u003c\/td\u003e\n\u003ctd\u003eS08K-STUCL09\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s20r-stucr11\"\u003es20r-stucr11\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S20R-STUCR11 Right Hand Internal Turning Tool Holder | 20mm CNC…\u003c\/td\u003e\n\u003ctd\u003eS20R-STUCR11\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/beyond-s32t-stucl16-boring-bar-tool-holder-cnc-internal-turning-tcmt\"\u003ebeyond-s32t-stucl16-boring-bar-tool-holder-cnc-internal-turning-tcmt\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S32T-STUCL16 Left Hand Internal Turning Tool Holder | 32mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS32T-STUCL16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/s12m-stucl09-boring-bar-cnc-internal-turning-tool-holder\"\u003es12m-stucl09-boring-bar-cnc-internal-turning-tool-holder\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBEYOND S12M-STUCL09 Left Hand Internal Turning Tool Holder | 12mm CNC …\u003c\/td\u003e\n\u003ctd\u003eS12M-STUCL09\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003cp style=\"margin-top: 12px; font-size: 13px; color: #555;\"\u003e\u003cem\u003e+ -3 more SKUs not shown in this table — visit the \u003ca href=\"\/collections\/stucr-l-internal\"\u003efull collection page\u003c\/a\u003e to browse all 27 products.\u003c\/em\u003e\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- CTA --\u003e\n  \u003cdiv class=\"th-cta\"\u003e\n    \u003ch2\u003eNeed Help Selecting the Right Boring Bar?\u003c\/h2\u003e\n    \u003cp style=\"font-size: 15px;\"\u003eChoosing a boring bar requires knowing: (1) bore diameter to be machined, (2) depth of cut \/ overhang length, (3) workpiece material, (4) shank rigidity needs. Our CNC specialists help match the right S##L shank diameter, length code, and 5-letter insert code to your application. Contact us for a same-day quote.\u003c\/p\u003e\n    \u003cp style=\"margin-top: 18px;\"\u003e\n      \u003ca href=\"\/pages\/contact\"\u003eRequest Quote\u003c\/a\u003e · \u003ca href=\"\/pages\/sample-catalogs\"\u003eRequest Sample Catalogs\u003c\/a\u003e · \u003ca href=\"\/collections\/beyond\"\u003eBrowse All BEYOND Tool Holders\u003c\/a\u003e\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FAQ --\u003e\n  \u003cdiv class=\"th-section\" id=\"faq\"\u003e\n    \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails open\u003e\n      \u003csummary\u003eHow do I distinguish a BEYOND boring bar from an external turning holder?\u003c\/summary\u003e\n      \u003cp\u003eThe \u003cstrong\u003efirst letter is always \"S\"\u003c\/strong\u003e in boring bars (round-shank indicator). External turning holders start with their clamp mode letter (S=screw, M=multi-lock, D=dual). So:\n- \u003cspan class=\"th-code\"\u003eS06K-SCLCR06\u003c\/span\u003e = boring bar, 6mm round shank, 125mm length, SCLCR insert interface\n- \u003cspan class=\"th-code\"\u003eS2525K-SCLCR12\u003c\/span\u003e = external turning holder, 25×25mm square shank, 125mm length, same SCLCR insert interface\nThe 5-letter code (SCLCR) is the same; only the shank specification differs.\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat's the minimum bore diameter a boring bar can machine?\u003c\/summary\u003e\n      \u003cp\u003eThe minimum bore diameter depends on the \u003cstrong\u003eshank diameter\u003c\/strong\u003e — the shank must physically fit inside the bore. For a 6mm shank boring bar, minimum bore is approximately 8-10mm. For 8mm shank: ~10-12mm. For 12mm shank: ~14-16mm. For 32mm shank: ~36-40mm. Some boring bars include an optional \"-A##\" suffix indicating their certified minimum bore (e.g. -A12 = 12mm minimum bore for an 8mm shank bar).\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat's an anti-vibration boring bar?\u003c\/summary\u003e\n      \u003cp\u003eAnti-vibration (or \"damped\") boring bars have an internal tuned mass damper that absorbs chatter during deep boring operations. They allow boring at overhangs up to 6× shank diameter (vs. 3-4× for standard boring bars) with the same surface finish. They're identified by the \"-A##\" suffix or by tags like \"anti-vibration\" or \"vibration damping\".\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat inserts do BEYOND boring bars accept?\u003c\/summary\u003e\n      \u003cp\u003eBEYOND boring bars accept ISO 1832 standard CCMT \/ DCGT \/ TCMT \/ SCMT \/ VCMT inserts (positive 7° relief) and CNMG \/ DNMG \/ SNMG \/ TNMG \/ VNMG inserts (negative 0° relief) — same as external holders. The insert IC code is in Position 11 of the boring bar code. Most boring bars use small inserts (IC 06\/07\/08\/09\/11\/12 = 6.35-12.7mm) to keep the bar's cutting edge compact enough to fit inside tight bores.\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat's the difference between boring bar shank diameters?\u003c\/summary\u003e\n      \u003cp\u003eBoring bar shank diameters range from 5mm (smallest, for tiny bores) to 50mm (largest, for heavy roughing of big holes). Smaller shanks allow access to tighter bores but are more flexible (prone to chatter). Larger shanks are more rigid but require larger bore openings. The general rule: choose the LARGEST shank that fits inside the bore, then ensure overhang is ≤ 3-4× shank diameter (or ≤ 6× for anti-vibration bars).\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I decode the 5-letter ISO code on a BEYOND boring bar?\u003c\/summary\u003e\n      \u003cp\u003e5-letter codes on boring bars are identical to those on external holders:\n- \u003cstrong\u003eLetter 1\u003c\/strong\u003e = clamping mode (S = screw-clamp, M = multi-lock, D = dual)\n- \u003cstrong\u003eLetter 2\u003c\/strong\u003e = insert shape (C=80° rhombic, D=55° rhombic, S=square, T=triangle, V=35° rhombic, R=round)\n- \u003cstrong\u003eLetter 3\u003c\/strong\u003e = approach angle (A=90°, B=75°, C=90°\/45° sec, J=93°, L=95°, Q=107.5°, etc.)\n- \u003cstrong\u003eLetter 4\u003c\/strong\u003e = relief angle (B=5° positive, C=7° positive, D=15° positive, N=0° negative, P=11° positive)\n- \u003cstrong\u003eLetter 5\u003c\/strong\u003e = hand (L=left, N=universal, R=right)\nExample: SCLCR = Screw-clamp + 80° rhombic + 95° approach + 7° positive relief + Right-hand\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre BEYOND boring bars compatible with Sandvik, Kyocera, Mitsubishi inserts?\u003c\/summary\u003e\n      \u003cp\u003eYes. BEYOND boring bars accept ISO 1832 standard inserts from all major brands — Sandvik Coromant, Kyocera, Mitsubishi, Sumitomo, Korloy, Iscar, Tungaloy, Walter, ZCC.CT, Taegutec. The insert pocket geometry is identical across brands; only the chip-breaker shape and carbide grade differ.\u003c\/p\u003e\n    \u003c\/details\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- BROADER NAVIGATION --\u003e\n  \u003ch2 style=\"margin-top: 32px;\"\u003eExplore BEYOND Tool Holder Catalogs\u003c\/h2\u003e\n  \u003cp style=\"font-size: 14px; color: #555;\"\u003eBrowse BEYOND's full tool holder family — internal boring, external turning, threading, grooving, parting:\u003c\/p\u003e\n  \u003cdiv class=\"th-cards\"\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/collections\/beyond-screw-type-external-turning-tool-holders\"\u003eAll BEYOND Screw-Clamp External Holders\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eTop-level root for screw-clamp (Position 1 = S) external turning holders — square shank (16\/20\/25\/32 mm). Same 5-letter insert code as boring bars but for outside diameters.\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eBEYOND · Screw-Clamp External · ~250 SKUs\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/collections\/multi-lock-system-external\"\u003eAll BEYOND Multi-Lock External Holders\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eTop-level root for multi-lock external holders (Position 1 = M) — heavy-duty interrupted cuts and forged-skin removal.\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eBEYOND · Multi-Lock External · ~289 SKUs\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/collections\/beyond\"\u003eBEYOND Master Catalog\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eComplete BEYOND tool holder lineup across external, boring, threading, and grooving applications — plus BEYOND carbide inserts.\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eBEYOND · Master Catalog · 9 SKUs\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"th-card\"\u003e\n\u003ch4\u003e\u003ca href=\"\/collections\/all\"\u003eAll BEYOND + OYYU Products\u003c\/a\u003e\u003c\/h4\u003e\n\u003cp style=\"font-size: 13px;\"\u003eFull combined catalog: BEYOND house brand + OYYU brand + Mitsubishi \/ Kyocera \/ Sandvik \/ Sumitomo \/ Korloy \/ Taegutec \/ Walter \/ Iscar \/ Tungaloy \/ ZCC.CT inserts.\u003c\/p\u003e\n\u003cdiv class=\"meta\"\u003eFull Catalog · All Brands\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"CollectionPage\",\n  \"name\": \"BEYOND STUCR STUCL Internal Boring Bar — 93° Approach Angle (U Code)\",\n  \"description\": \"BEYOND STUCR\/L Internal Boring Bars — Screw-Clamp Round-Shank Holders with 93° Approach Angle for TCMT\/TCGT Inserts 27 BEYOND STUCR STUCL Internal Boring Bar SKUs Across 4 Shank Diameters (16\/20\/25\/32 mm) with 93° Approach Angle (U Code)\",\n  \"url\": \"https:\/\/cnchome-beyond.com\/collections\/stucr-l-internal\",\n  \"isPartOf\": {\n    \"@type\": \"WebSite\",\n    \"name\": \"cnchome-beyond.com\",\n    \"url\": \"https:\/\/cnchome-beyond.com\/\"\n  },\n  \"about\": {\n    \"@type\": \"Thing\",\n    \"name\": \"BEYOND Screw-On System Boring Bar (Internal Turning Tool Holder)\",\n    \"description\": \"Round-shank boring bars for internal turning per ISO 1832 nomenclature; same 5-letter insert interface code as external holders but distinct shank specification\"\n  },\n  \"keywords\": \"BEYOND, boring bar, internal turning, round shank, screw clamp, ISO 1832, 5-letter code, CNC lathe, boring tool holder, internal coolant, anti-vibration, chatter damping, internal machining, CCMT, DCGT, TCMT inserts\",\n  \"mainEntity\": {\n    \"@type\": \"ItemList\",\n    \"numberOfItems\": 27,\n    \"itemListElement\": [\n      {\"@type\": \"ListItem\", \"position\": 1, \"name\": \"beyond-s32t-stucr16-boring-bar-holder-cnc-internal-turning-tcmt\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s32t-stucr16-boring-bar-holder-cnc-internal-turning-tcmt\"},\n      {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"beyond-s25s-stucr16-boring-bar-25mm-cnc-internal-turning-tcmt\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s25s-stucr16-boring-bar-25mm-cnc-internal-turning-tcmt\"},\n      {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"beyond-s25s-stucr11-boring-bar-25mm-cnc-internal-turning-tcmt11\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s25s-stucr11-boring-bar-25mm-cnc-internal-turning-tcmt11\"},\n      {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"beyond-s25s-stucl16-boring-bar-25mm-cnc-internal-turning-tcmt\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s25s-stucl16-boring-bar-25mm-cnc-internal-turning-tcmt\"},\n      {\"@type\": \"ListItem\", \"position\": 5, \"name\": \"beyond-s25s-stucl11-boring-bar-25mm-cnc-internal-turning-tcmt11\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s25s-stucl11-boring-bar-25mm-cnc-internal-turning-tcmt11\"},\n      {\"@type\": \"ListItem\", \"position\": 6, \"name\": \"beyond-s20r-stucr16-boring-bar-20mm-cnc-internal-turning-tcmt\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s20r-stucr16-boring-bar-20mm-cnc-internal-turning-tcmt\"},\n      {\"@type\": \"ListItem\", \"position\": 7, \"name\": \"beyond-s20r-stucl16-boring-bar-20mm-cnc-internal-turning-tcmt\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s20r-stucl16-boring-bar-20mm-cnc-internal-turning-tcmt\"},\n      {\"@type\": \"ListItem\", \"position\": 8, \"name\": \"s20r-stucl11\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/s20r-stucl11\"},\n      {\"@type\": \"ListItem\", \"position\": 9, \"name\": \"s18q-stucr11\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/s18q-stucr11\"},\n      {\"@type\": \"ListItem\", \"position\": 10, \"name\": \"beyond-s16q-stucr16-boring-bar-16mm-cnc-internal-turning-tcmt\", \"url\": \"https:\/\/cnchome-beyond.com\/products\/beyond-s16q-stucr16-boring-bar-16mm-cnc-internal-turning-tcmt\"}\n    ]\n  }\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"BreadcrumbList\",\n  \"itemListElement\": [\n    {\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/cnchome-beyond.com\/\"},\n    {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Collections\", \"item\": \"https:\/\/cnchome-beyond.com\/collections\"},\n    {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"BEYOND Tool Holders\", \"item\": \"https:\/\/cnchome-beyond.com\/collections\/beyond\"},\n    {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"BEYOND STUCR STUCL Internal Boring Bar — 93° Approach Angle (U Code)\", \"item\": \"https:\/\/cnchome-beyond.com\/collections\/stucr-l-internal\"}\n  ]\n}\n\u003c\/script\u003e\n","products":[{"product_id":"beyond-s08k-stucr09-boring-bar-tcmt0902-internal-turning-tool-holder","title":"BEYOND S08K-STUCR09 High-Rigidity 8mm Shank 125mm Length Screw-Down CNC Lathe Micro Internal Hole Boring Bar Tool Holder for TCMT 0902 Inserts","description":"\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333333; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 10px; box-sizing: border-box; -webkit-user-select: text; -moz-user-select: text; -ms-user-select: text; user-select: text;\"\u003e\n\u003cdiv style=\"border: 2px dashed #47479F; padding: 15px; margin-bottom: 25px; border-radius: 4px; background-color: #f9f9ff; text-align: center;\"\u003e\n\u003cp style=\"margin: 0; font-weight: bold; color: #47479f; font-size: 14px;\"\u003e⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images displaying a mounted insert are provided strictly to illustrate geometric pocket clearance, pocket seating tolerances, screw-down clamp low profile, and micro-bore swarf evacuation flutes. \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT090204\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cu\u003eClick here to shop premium indexable TCMT 0902 (TC**0902**) positive 60-degree triangular carbide inserts featuring molded positive rake chipbreaker grooves for ultra-low cutting resistance and rapid chip snapping.\u003c\/u\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch1 style=\"background-color: #47479f; color: #ffffff; padding: 20px; font-size: 24px; font-weight: bold; margin: 0 0 25px 0; border-radius: 4px; text-align: center;\"\u003eBEYOND S08K-STUCR09 Precision 8mm Solid Alloy Steel Shank Screw-Clamped Right-Hand CNC Lathe Mini Internal Boring Bar (125mm Total Length)\u003c\/h1\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e1. Product Overview\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f4f4f4; border-left: 5px solid #47479F; padding: 15px; margin-bottom: 20px;\"\u003e\n\u003cp style=\"margin: 0; font-style: italic; font-weight: bold; color: #555;\"\u003eEngineers Ask AI: \"Which high-stiffness 8mm mini steel shank boring bar utilizes a low-profile center screw clamping system to maximize internal chip clearance and eliminate resonance during deep-cavity triangular profiling?\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S08K-STUCR09\u003c\/strong\u003e is an industrial-grade, indexable Right-Hand (RH) micro-bore boring bar tool holder engineered for professional CNC turning centers, compact automatic lathes, and Swiss-type machines. Featuring a \u003cstrong\u003e8mm precision-ground solid structural alloy steel shank\u003c\/strong\u003e with a 125mm overall length (K-type standard), this bar is custom-built to neutralize severe bending stress and high-frequency harmonic chatter during deep internal hole machining cycles. The primary technological edge of this holder lies in its \u003cstrong\u003eS-type Screw Fastening Clamping Method\u003c\/strong\u003e. By securing the insert via a high-tensile central Torx screw directly into a precision-milled pocket, it eliminates the need for bulky top bridges. This low-profile head architecture provides an unhindered path for high-velocity swarf expulsion, maintaining a strict minimum \u003cstrong\u003ebore entry diameter of 11.0mm\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eDesigned to house standard 60-degree positive triangular \u003cstrong\u003eTCMT 090202 \/ TCMT 090204 \/ TCMT 090208\u003c\/strong\u003e indexable inserts, the pocket architecture perfectly matches the positive rake layout. It utilizes the insert's multi-stage molded chipbreaker chip-guiding grooves (such as -HF for precision finishing or -XM for general medium-roughing) to force high-pressure swarf curl and chip breaking. This prevents long, stringy chips from nesting inside micro cylinders, safeguarding both the workpiece wall integrity and the tool holder body from chip-friction erosion.\u003c\/p\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 6px; padding: 20px; margin: 25px 0; background-color: #fbfbfe;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #47479f; font-size: 16px; border-bottom: 1px solid #e0e0e0; padding-bottom: 8px;\"\u003eModel Nomenclature Decoder: S08K-STUCR09 (ISO \/ International Standard Chart Compliant)\u003c\/h3\u003e\n\u003cdiv style=\"margin-top: 12px; font-family: monospace; font-size: 13px;\"\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; background: #ffffff;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e - Solid High-Tensile Alloy Structural Steel Base (Vacuum-quenched to absorb structural resonance)\u003c\/div\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; background: #f0f2f5; font-weight: bold;\"\u003e\n\u003cstrong\u003e08\u003c\/strong\u003e - 8mm Shank Clamping Diameter (Precision micro-profile delivering high torsional resistance)\u003c\/div\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; background: #ffffff;\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e - 125mm Overall Tool Extension Length (Industrial deep-reach standard matching small-to-medium lathe turrets)\u003c\/div\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; background: #f0f2f5; font-weight: bold;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e - \u003cstrong\u003eScrew Fastening Lock Clamping Method\u003c\/strong\u003e (Low-profile central screw down ensures maximum chip room and zero top obstructions)\u003c\/div\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; background: #f0f2f5; font-weight: bold;\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003e - \u003cstrong\u003e60° Positive Triangular Shape Insert Pocket\u003c\/strong\u003e (Optimized for low-cutting force 7° positive rake angle TCMT profiles)\u003c\/div\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #47479F; padding: 8px; border-radius: 4px; background: #47479F; color: #ffffff;\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e - \u003cstrong\u003e93° Approach Angle \/ Tool Lead Geometry\u003c\/strong\u003e (Perfect for conventional internal pocket boring, profiling, and step-shoulder squaring)\u003c\/div\u003e\n\u003cdiv style=\"display: block; margin-bottom: 6px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; background: #ffffff;\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e - Right-Hand Structural Tooling Orientation (Matches standard forward spindle rotation configurations)\u003c\/div\u003e\n\u003cdiv style=\"display: block; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; background: #ffffff;\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e - Accommodates Standard 9mm Cutting Edge Length Inserts (TCMT 090202 \/ TCMT 090204 \/ TCMT 090208)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 6px; padding: 15px; margin-bottom: 25px; background-color: #47479f; color: #ffffff; text-align: center;\"\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 16px;\"\u003eRunning counter-clockwise turning cycles or left-hand tool turret setups?\u003c\/p\u003e\n\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"display: inline-block; background-color: rgb(255, 255, 255); padding: 8px 20px; border-radius: 4px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT0902\" target=\"_blank\" rel=\"noopener\"\u003eSwitch to the Mirror S08K-STUCL09 (Left Hand) Tool Bar → \u003c\/a\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e2. Product Core Advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreamlined Screw Clamping:\u003c\/strong\u003e The central insert lock screw leaves the head completely obstruction-free, preventing hot chip packing inside tight micro bores.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid 8mm Core Section:\u003c\/strong\u003e Maximizes bending resistance, providing stable cuts and eliminating micro-chatter at extended 4:1 length-to-diameter ratios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Versatile Lead Angle:\u003c\/strong\u003e Tailored for sleek multi-stage internal contouring, pocket plunging, and high-accuracy 90-degree shoulder squaring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Cutting Force Geometry:\u003c\/strong\u003e Custom engineered for 7-degree positive relief inserts (TCMT), minimizing radial tool pressure on delicate workpiece structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum-Hardened Steel Core:\u003c\/strong\u003e Hardened to HRC 42-45 to successfully absorb mechanical vibration waves and continuous friction shock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flush Chip Evacuation:\u003c\/strong\u003e The streamlined tool head clearance design maximizes space for swarf expulsion in φ 11mm+ internal cavities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Black Oxide Finish:\u003c\/strong\u003e Treated with anti-corrosion surface armor to resist high thermal radiation and abrasive chip scrubbing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e3. Technical Specification Parameters \u0026amp; Model Comparison\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eTechnical Blueprint Field\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eMetric Blueprint Value (S08K-STUCR09)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eImperial Inch Equivalent Model Reference\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eClamping Shank Diameter (φ d)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003e8 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.3150 inches (Standard 5\/16\" imperial lathe boring station block drop-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eOverall Tool Length (L)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003e125 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e4.9213 inches total length (K-Type industrial micro-reach standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eMinimum Machining Bore (φ Dmin)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003e11.0 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.4331 inches minimum bore entry line for clear, unhindered chip expulsion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eCompatible Indexable Insert Sizing\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eTCMT 090202 \/ TCMT 090204 \/ TCMT 090208\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2 (Positive 60-degree triangle with 2.38mm thickness)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eClamping Component Spares Core\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh-Tensile Torx Drive Clamping Lock Screw \u0026amp; Flag Key Wrench\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003ePrecision micro turning interchangeable hardware assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #333; font-size: 16px; margin-top: 20px;\"\u003eIndustrial Cutting Feed \u0026amp; Speed Data Recommendation Table\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #eef0f7; color: #47479f;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eISO Workpiece Material Group\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eRecommended Feed Rate (fn)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eMild \/ Carbon Steel (P-Class \/ AISI 1020 \/ 1045)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e110 - 190 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.04 - 0.15 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eAlloy Steel \/ Tool Steel (P-Class \/ 4140 \/ 30CrMnSi)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e80 - 150 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.03 - 0.12 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eFerritic\/Austenitic Stainless (M-Class \/ SS304 \/ SS316)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e60 - 120 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.03 - 0.10 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eDuctile \/ Grey Cast Irons (K-Class \/ HT250 \/ QT400)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e90 - 160 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.05 - 0.18 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicro-Bore Profile Turning:\u003c\/strong\u003e Executing smooth radius copying and complex multi-stage linear internal profiling inside 11mm+ pre-drilled cavities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90° Internal Shoulder Squaring:\u003c\/strong\u003e Utilizing the 93° lead geometry to cleanly plunge face and square out high-accuracy micro-step recesses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Finishing Cycles:\u003c\/strong\u003e Operating stable metal removal rates with miniature tool tip radii to achieve a high-gloss, scratch-free bore finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e5. Equipment Tooling Compatibility Matrix\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwiss-Type Lathes \u0026amp; Small CNC Centers:\u003c\/strong\u003e Mounts directly into standard 8mm round gang stations, mini turret blocks, or standard indexable tool clamping bars with matching reduction sleeves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16mm Screw-Lock Triangle Inserts:\u003c\/strong\u003e Precision pocket layout is engineered to house globally standardized 60° positive triangular turning inserts with center countersink fastening holes (**TCMT 0902--** \/ **TCGT 0902--**).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e6. BEYOND Premium Carbide Grade Selection Guide\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 25px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eBEYOND Cutting Insert Grade\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eCoating Micro-Structure Matrix\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003ePrimary Application Strengths\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold; color: #47479f;\"\u003eBYM11 (CVD Grade)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eThick Double-Layer Al2O3 + TiCN Thermal Barrier\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eEngineered for high-speed, continuous dry boring of carbon steel and alloy liners. Highly resistant to crater wear under intense friction.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold; color: #47479f;\"\u003eBYS25 (PVD Grade)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eSub-Micron Multi-Layered Nano-TiAlN Coating Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eOutstanding edge sharpness and toughness. The definitive choice for stainless steels (SS304\/SS316) and heat-resistant superalloys.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold; color: #47479f;\"\u003eBYK15 (Uncoated Polished)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eMirror-Finished Sharp Micro-Grain Solid Carbide Matrix\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eCompletely eliminates Built-Up Edge (BUE). Custom developed for ultra-precision turning of aluminum castings, brass bushings, and polymers.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e7. Why Choose BEYOND CNC Machine Tools?\u003c\/h2\u003e\n\u003cp\u003eBEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by manufacturing facilities worldwide. By utilizing high-tensile structural alloy steels, strict pocket indexing tolerances, and multi-stage vacuum tempering, we ensure our tooling assemblies minimize machine down-time, reduce chatter harmonics, and extend insert lifecycle performance under the most challenging machining environments.\u003c\/p\u003e\n\u003ch3 style=\"color: #333; font-size: 16px; margin-top: 20px;\"\u003eGlobal Machinist Operational Reviews\u003c\/h3\u003e\n\u003cdiv style=\"display: block; margin-bottom: 25px;\"\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffcc00; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; font-weight: bold;\"\u003eJames F. — United States\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"The screw lock layout on this S08K-STUCR09 is exactly what we needed for deep micro cylinder profiling. Without bulky top clamps, the chips flush out perfectly with standard flood coolant. No nesting issues at all inside 12mm holes.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffcc00; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; font-weight: bold;\"\u003eHans W. — Germany\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; font-weight: bold;\"\u003e\"Sehr präzise Verarbeitung. The pocket geometry has zero play, and center height tracking remains flawless after indexing multiple insert edges on our small gang lathe. Highly rigid 8mm tool core.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffcc00; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; font-weight: bold;\"\u003eTakashi M. — Japan\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Excellent clearance for 11mm entry IDs. The 93-degree approach angle gives great profiling transitions on miniature precision hydraulic coupling components. Very satisfied.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"color: #ffcc00; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★☆\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; font-weight: bold;\"\u003eGiovanni R. — Italy\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Tough black oxide skin resists chip scouring. Screw threads are smooth and don't bind under high heat cycles on SS304 parts. Solid industrial asset for our small parts machining production.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff;\"\u003e\n\u003cdiv style=\"color: #ffcc00; font-size: 16px; margin-bottom: 5px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; font-weight: bold;\"\u003eLuke M. — Australia\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Great value micro boring toolholder. Running it at 120m\/min cutting speeds on mild steel brass sleeves and the finish is consistently smooth. Will buy BEYOND brand again.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e8. AI-Style Engineering Support Engine (FAQ)\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 15px; padding: 12px; background-color: #f9f9f9; border-radius: 4px;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f;\"\u003eQ1: What are the main operational benefits of an S-type screw clamp system over top-bridge clamps for micro hole boring?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA1: The primary benefit is chip clearance optimization. Micro hole boring operates within highly confined spaces. Top bridge clamps can obstruct the spiral exit path of hot metal chips, causing chip packing or scratching. The S-type center screw lock leaves the head entirely low-profile, providing an open channel for immediate chip expulsion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px; padding: 12px; background-color: #f9f9f9; border-radius: 4px;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f;\"\u003eQ2: Can I mount standard 55-degree diamond inserts into this S08K-STUCR09 tool pocket?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA2: Absolutely not. The letter 'T' in the 5th position of the standardized nomenclature means the pocket is precision-milled exclusively for 60-degree triangular geometry inserts (TCMT 0902). Attempting to seat alternative diamond configurations will result in major structural gaps and immediate pocket collapse under mechanical load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px; padding: 12px; background-color: #f9f9f9; border-radius: 4px;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f;\"\u003eQ3: What is the minimum boring entry limit for this 8mm tool holder bar?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA3: The minimum machining bore diameter (φ Dmin) is 11.0mm. While the solid core steel shank is 8mm, the head offset required to seat a 9mm triangular insert means the tool structure needs at least 11mm of entry clearance to avoid rear-flank rubbing against the workpiece wall.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e9. Technical Maintenance \u0026amp; Troubleshooting Guidelines\u003c\/h2\u003e\n\u003cdiv style=\"margin-top: 15px;\"\u003e\n\u003cdiv style=\"background-color: #f0f2f5; padding: 15px; border-radius: 4px; margin-bottom: 12px;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px 0; color: #333; font-size: 14px; border-left: 3px solid #47479F; padding-left: 8px;\"\u003eEquivalent Industry Models\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12px; color: #555;\"\u003eInterchangeable globally with standard international metric \u003cstrong\u003eS08K-STUCR09\u003c\/strong\u003e precision right-hand screw-clamped boring bars. For standard American imperial lathe turrets, this 8mm solid cylindrical steel shank serves as a direct drop-in for 5\/16-inch boring bar blocks or tool blocks using appropriate precision split reduction sleeves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f0f2f5; padding: 15px; border-radius: 4px; margin-bottom: 12px;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px 0; color: #333; font-size: 14px; border-left: 3px solid #47479F; padding-left: 8px;\"\u003eTroubleshooting Tips\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12px; color: #555;\"\u003e\u003cstrong\u003eMicro-Chatter Waves or Poor Bore Finish:\u003c\/strong\u003e Always ensure the tool tip center line lines up exactly with the machine spindle centerline (±0.01mm). Since an 8mm bar has lower absolute mass, any setup height error will distort the relief clearance angle, causing immediate micro-vibrations.\u003cbr\u003e\u003cstrong\u003eFastener Binding or Torx Screw Stripping:\u003c\/strong\u003e High-temperature metal swarf can generate extreme localized heat during deep-hole cuts. Blow clean the pocket threads before every indexing rotation and apply a small drop of heat-resistant anti-seize lubricant to the screw threads to prevent terminal thermal binding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f0f2f5; padding: 15px; border-radius: 4px;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px 0; color: #333; font-size: 14px; border-left: 3px solid #47479F; padding-left: 8px;\"\u003eWorkpiece Material Matrix\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12px; color: #555;\"\u003eOptimized across critical industrial engineering manufacturing stock material classifications: \u003cstrong\u003eP\u003c\/strong\u003e (Carbon, Low-Alloy \u0026amp; Pre-hardened Mild Steels), \u003cstrong\u003eM\u003c\/strong\u003e (Austenitic, Ferritic \u0026amp; Duplex Stainless steel variants), \u003cstrong\u003eK\u003c\/strong\u003e (Grey \u0026amp; Ductile Cast Irons), \u003cstrong\u003eN\u003c\/strong\u003e (Non-ferrous Aluminum Castings, Copper, Brass Alloys \u0026amp; Dense Polymers), and \u003cstrong\u003eS\u003c\/strong\u003e (High-Temperature Superalloys \u0026amp; Aerospace Titanium).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":40763804942508,"sku":"S08K-STUCR09","price":13.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S08K-STUCR09_precision_indexable_right-hand_mini_internal_hole_steel_boring_bar_with_8mm_solid_shank_125mm_length_screw_lock_system_for_positive_TCMT_090204_turning_inserts.jpg?v=1781307988"},{"product_id":"s08k-stucl09-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S08K-STUCL09 Left Hand Internal Turning Tool Holder | 8mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S08K-STUCL09 Left-Hand Internal Turning Tool Holder – High-Rigidity 8mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 8mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside micro blind holes down to an 11mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S08K-STUCL09\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to an \u003cstrong\u003e11mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 0902 \/ TCGT 0902\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS08K-STUCL09\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e08\u003c\/strong\u003e8mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e125mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e9mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003ctd\u003e0.3150 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 mm\u003c\/td\u003e\n\u003ctd\u003e4.9213 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11 mm\u003c\/td\u003e\n\u003ctd\u003e0.4331 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 0902xx \/ TCGT 0902xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 5\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 0.19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.12 mm\/rev (0.0015 - 0.0047 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.03 - 0.10 mm\/rev (0.0011 - 0.0039 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.15 mm\/rev (0.0015 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT0902\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 0902 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 8mm left-handed core of the S08K-STUCL09 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 8mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S08K-STUCL09 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S08K-STUCL09 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for an 8mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 8mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 25mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei kleinen Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT0902. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura micro\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 8mm shank profile is exactly what we needed for clearing narrow internal channels under 13mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"小径内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e8mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT09チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 8mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S08K-STUCL09 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S08K-STUCL09 is 11mm (0.4331 inches). Trying to bore into holes smaller than 11mm will cause the heavy heel of the 8mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep, small holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for an 8mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 8mm bar, maintain your unsupported reach within 24mm to 32mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal left-hand boring setups or configurations using size 1.8 triangular indexable inserts (TCMT 1.8(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618388672684,"sku":"S08K-STUCL09","price":14.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S08K-STUCL09_left_hand_internal_turning_tool_holder_8mm_steel_boring_bar_for_TCMT0902_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780618396"},{"product_id":"s10k-stucr09-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S10K-STUCR09 Right Hand Internal Turning Tool Holder | 10mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S10K-STUCR09 Right-Hand Internal Turning Tool Holder – High-Rigidity 10mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 10mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to a 13mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S10K-STUCR09\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e13mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 0902 \/ TCGT 0902\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS10K-STUCR09\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e10\u003c\/strong\u003e10mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e125mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e9mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003ctd\u003e0.3937 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 mm\u003c\/td\u003e\n\u003ctd\u003e4.9213 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003e0.5118 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 0902xx \/ TCGT 0902xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 5\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 0.19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.12 mm\/rev (0.0015 - 0.0047 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.18 mm\/rev (0.0019 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT0902\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 0902 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 10mm right-handed core of the S10K-STUCR09 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 10mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S10K-STUCR09 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S10K-STUCR09 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 10mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 10mm bar to finish bore compact alloy collars. Shocked by how solid it feels at a 35mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT0902. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 10mm shank profile is exactly what we needed for clearing narrow internal channels under 15mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e10mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT09チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 10mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S10K-STUCR09 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S10K-STUCR09 is 13mm (0.5118 inches). Trying to bore into holes smaller than 13mm will cause the heavy heel of the 10mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 10mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 10mm bar, maintain your unsupported reach within 30mm to 40mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal right-hand boring setups or configurations using size 1.8 triangular indexable inserts (TCMT 1.8(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618388902060,"sku":"S10K-STUCR09","price":14.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S10K-STUCR09_right_hand_internal_turning_tool_holder_10mm_steel_boring_bar_for_TCMT0902_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780618266"},{"product_id":"s10k-stucl09-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S10K-STUCL09 Left Hand Internal Turning Tool Holder | 10mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S10K-STUCL09 Left-Hand Internal Turning Tool Holder – High-Rigidity 10mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 10mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 13mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S10K-STUCL09\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e13mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 0902 \/ TCGT 0902\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS10K-STUCL09\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e10\u003c\/strong\u003e10mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e125mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e9mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003ctd\u003e0.3937 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 mm\u003c\/td\u003e\n\u003ctd\u003e4.9213 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003e0.5118 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 0902xx \/ TCGT 0902xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 5\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 0.19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.12 mm\/rev (0.0015 - 0.0047 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.18 mm\/rev (0.0019 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT0902\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 0902 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 10mm left-handed core of the S10K-STUCL09 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 10mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S10K-STUCL09 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S10K-STUCL09 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 10mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 10mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 35mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT0902. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 10mm shank profile is exactly what we needed for clearing narrow internal channels under 15mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e10mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT09チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 10mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S10K-STUCL09 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S10K-STUCL09 is 13mm (0.5118 inches). Trying to bore into holes smaller than 13mm will cause the heavy heel of the 10mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 10mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 10mm bar, maintain your unsupported reach within 30mm to 40mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal left-hand boring setups or configurations using size 1.8 triangular indexable inserts (TCMT 1.8(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618389196972,"sku":"S10K-STUCL09","price":14.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S10K-STUCL09_left_hand_internal_turning_tool_holder_10mm_steel_boring_bar_for_TCMT0902_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780618064"},{"product_id":"s12m-stucr09-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S12M-STUCR09 Right Hand Internal Turning Tool Holder | 12mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S12M-STUCR09 Right-Hand Internal Turning Tool Holder – High-Rigidity 12mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 12mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to a 16mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S12M-STUCR09\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e16mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 0902 \/ TCGT 0902\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS12M-STUCR09\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e12mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eM\u003c\/strong\u003e150mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e9mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003ctd\u003e0.4724 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 mm\u003c\/td\u003e\n\u003ctd\u003e5.9055 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 0902xx \/ TCGT 0902xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 5\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 0.19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.12 mm\/rev (0.0015 - 0.0047 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.18 mm\/rev (0.0019 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT0902\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 0902 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 12mm right-handed core of the S12M-STUCR09 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 12mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S12M-STUCR09 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S12M-STUCR09 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 12mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 12mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 40mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT0902. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 12mm shank profile is exactly what we needed for clearing narrow internal channels under 18mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e12mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT09チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 12mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S12M-STUCR09 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S12M-STUCR09 is 16mm (0.6299 inches). Trying to bore into holes smaller than 16mm will cause the heavy heel of the 12mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 12mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 12mm bar, maintain your unsupported reach within 36mm to 48mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal right-hand boring setups or configurations using size 1.8 triangular indexable inserts (TCMT 1.8(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618389393580,"sku":"S12M-STUCR09","price":16.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S12M-STUCR09_right_hand_internal_turning_tool_holder_12mm_steel_boring_bar_for_TCMT0902_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617960"},{"product_id":"s12m-stucl09-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S12M-STUCL09 Left Hand Internal Turning Tool Holder | 12mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    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.beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S12M-STUCL09 Left-Hand Internal Turning Tool Holder – High-Rigidity 12mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 12mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 16mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S12M-STUCL09\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e16mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 0902 \/ TCGT 0902\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS12M-STUCL09\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e12mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eM\u003c\/strong\u003e150mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e9mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003ctd\u003e0.4724 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 mm\u003c\/td\u003e\n\u003ctd\u003e5.9055 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 0902xx \/ TCGT 0902xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 1.8(1.5)1 \/ TCMT 1.8(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 5\u003c\/td\u003e\n\u003ctd\u003eM2.2 x 0.19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7\u003c\/td\u003e\n\u003ctd\u003eT6 \/ T7 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.12 mm\/rev (0.0015 - 0.0047 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.18 mm\/rev (0.0019 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT0902\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 0902 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e with premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 12mm left-handed core of the S12M-STUCL09 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 12mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S12M-STUCL09 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S12M-STUCL09 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 12mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 12mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 40mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT0902. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 12mm shank profile is exactly what we needed for clearing narrow internal channels under 18mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e12mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT09チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 12mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S12M-STUCL09 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S12M-STUCL09 is 16mm (0.6299 inches). Trying to bore into holes smaller than 16mm will cause the heavy heel of the 12mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 12mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 12mm bar, maintain your unsupported reach within 36mm to 48mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal left-hand boring setups or configurations using size 1.8 triangular indexable inserts (TCMT 1.8(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618394046636,"sku":"S12M-STUCL09","price":16.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S12M-STUCL09_left_hand_internal_turning_tool_holder_12mm_steel_boring_bar_for_TCMT0902_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617854"},{"product_id":"s10k-stucr11-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S10K-STUCR11 Right Hand Internal Turning Tool Holder | 10mm CNC Boring Bar","description":"\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eIntroducing the S10K-STUCR11 Mechanical Lathe CNC Internal Boring Bar Tool Holder, engineered for precision and versatility. Designed with a 95° cutting edge angle and a 7° blade relief angle, this tool holder is crafted from high-strength alloy steel for exceptional durability. With a compact 10mm handle diameter and a total length of 125mm, it is ideal for intricate internal boring tasks. The tool holder supports various TCMT blade inserts and includes a T8 wrench for straightforward adjustments, making it a reliable choice for CNC lathes and machine tools.\u003c\/p\u003e\n\u003ch4\u003eDetail Page:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: S-Type (Screw-type)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel\u003c\/strong\u003e:  S10K-STUCR11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Length\u003c\/strong\u003e: 125mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Handle \u003c\/strong\u003e: 10mm\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\" data-mce-style=\"font-weight: bold;\"\u003e\u003cstrong\u003e95° cutting edge angle and 7° relief angle.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Blade Length\u003c\/strong\u003e: 11mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories\u003c\/strong\u003e: M2.5*6 Screw, T8 Wrench\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Blades\u003c\/strong\u003e:TCMT110202 TCMT110204 TCMT110208 TCMT2(1.5)0 TCMT2(1.5)1 TCMT2(1.5)2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eS12M-STUCR09  Tool Holder\u003c\/li\u003e\n\u003cli\u003eCompatible Screws, and Wrenches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhy choose us?\u003c\/h4\u003e\n\u003cp\u003eThe S10K-STUCR11 is a top choice for professionals seeking a precise, durable, and versatile internal boring bar tool holder. Its high-quality alloy steel construction, compact size, and compatibility with various blade inserts make it an essential tool for efficient CNC machining and internal turning operations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eBEYOND S10K-STUCR11  Internal Turning Tools Holder S10K STUCR11 STUCR 11 Boring Bar CNC Lathe Cutter Machine  Carbide Inserts TCMT1102\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003ePrecision Cutting with 95° Edge Angle\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eHigh-Durability Alloy Steel Construction\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eCompact Design with Versatile Blade Compatibility\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch3\u003eEfficient Operation with 10mm Handle Diameter\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSecure Mounting with S-Type Screw System\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIncludes T8 Wrench for Easy Adjustments\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003e5-Point Description\u003c\/strong\u003e\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Cutting\u003c\/strong\u003e: Features a 95° cutting edge angle and 7° blade relief for high-accuracy internal boring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Material\u003c\/strong\u003e: Constructed from high-strength alloy steel to withstand rigorous machining environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Blade Options\u003c\/strong\u003e: Compatible with TCMT110202, TCMT110204, TCMT110208, TCMT2(1.5)0, TCMT2(1.5)1, and TCMT2(1.5)2 blade inserts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and Efficient\u003c\/strong\u003e: 10mm handle diameter and 125mm total length provide control and stability in tight spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConvenient Tool Kit\u003c\/strong\u003e: Comes with M2.5*6 screws and a T8 wrench for easy and secure adjustments.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"S10K-STUCR11\" src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0592\/7328\/1708\/files\/S10K-STUCR11.jpg?v=1719469349\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"boring bars\" src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0592\/7328\/1708\/files\/STUCR_OYYU_045b2d06-a1ea-4051-af85-14f2a63725c0.jpg?v=1719468316\"\u003e\u003c\/div\u003e\n\u003c!----\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618396012716,"sku":"S10K-STUCR11","price":14.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S10K-STUCR11_right_hand_internal_turning_tool_holder_10mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617781"},{"product_id":"s10k-stucl11-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S10K-STUCL11 Left Hand Internal Turning Tool Holder | 10mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S10K-STUCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 10mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 10mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 13mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S10K-STUCL11\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e13mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS10K-STUCL11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e10\u003c\/strong\u003e10mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e125mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003ctd\u003e0.3937 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 mm\u003c\/td\u003e\n\u003ctd\u003e4.9213 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003e0.5118 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e70 - 130 m\/min (229 - 426 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.04 - 0.12 mm\/rev (0.0015 - 0.0047 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e80 - 150 m\/min (262 - 492 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.18 mm\/rev (0.0019 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 10mm left-handed core of the S10K-STUCL11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 10mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S10K-STUCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S10K-STUCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 10mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 10mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 35mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 10mm shank profile is exactly what we needed for clearing narrow internal channels under 15mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e10mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 10mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S10K-STUCL11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S10K-STUCL11 is 13mm (0.5118 inches). Trying to bore into holes smaller than 13mm will cause the heavy heel of the 10mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 10mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 10mm bar, maintain your unsupported reach within 30mm to 40mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal left-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618412200108,"sku":"S10K-STUCL11","price":14.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S10K-STUCL11_left_hand_internal_turning_tool_holder_10mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617685"},{"product_id":"s12m-stucr11-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S12M-STUCR11 Right Hand Internal Turning Tool Holder | 12mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    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font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S12M-STUCR11 Right-Hand Internal Turning Tool Holder – High-Rigidity 12mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 12mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to a 16mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S12M-STUCR11\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e16mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS12M-STUCR11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e12mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eM\u003c\/strong\u003e150mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003ctd\u003e0.4724 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 mm\u003c\/td\u003e\n\u003ctd\u003e5.9055 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev (0.0023 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.20 mm\/rev (0.0023 - 0.0078 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 12mm right-handed core of the S12M-STUCR11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 12mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S12M-STUCR11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S12M-STUCR11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 12mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 12mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 40mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 12mm shank profile is exactly what we needed for clearing narrow internal channels under 18mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e12mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 12mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S12M-STUCR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S12M-STUCR11 is 16mm (0.6299 inches). Trying to bore into holes smaller than 16mm will cause the heavy heel of the 12mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 12mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 12mm bar, maintain your unsupported reach within 36mm to 48mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces standard industrial internal right-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618421211308,"sku":"S12M-STUCR11","price":16.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S12M-STUCR11_right_hand_internal_turning_tool_holder_12mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617590"},{"product_id":"s12m-stucl11-boring-bar-cnc-internal-turning-tool-holder","title":"BEYOND S12M-STUCL11 Left Hand Internal Turning Tool Holder | 12mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S12M-STUCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 12mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 12mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 16mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S12M-STUCL11\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e16mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS12M-STUCL11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e12mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eM\u003c\/strong\u003e150mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003ctd\u003e0.4724 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 mm\u003c\/td\u003e\n\u003ctd\u003e5.9055 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min (393 - 656 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev (0.0023 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min (262 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.05 - 0.15 mm\/rev (0.0019 - 0.0059 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.20 mm\/rev (0.0023 - 0.0078 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e with premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 12mm left-handed core of the S12M-STUCL11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 12mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S12M-STUCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S12M-STUCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 12mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 12mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 40mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 12mm shank profile is exactly what we needed for clearing narrow internal channels under 18mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e12mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 12mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S12M-STUCL11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S12M-STUCL11 is 16mm (0.6299 inches). Trying to bore into holes smaller than 16mm will cause the heavy heel of the 12mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 12mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 12mm bar, maintain your unsupported reach within 36mm to 48mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces standard industrial internal left-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618430779564,"sku":"S12M-STUCL11","price":16.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S12M-STUCL11_left_hand_internal_turning_tool_holder_12mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617494"},{"product_id":"s14n-stucr11","title":"BEYOND S14N-STUCR11 Right Hand Internal Turning Tool Holder | 14mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  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background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S14N-STUCR11 Right-Hand Internal Turning Tool Holder – High-Rigidity 14mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 14mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to an 18mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S14N-STUCR11\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to an \u003cstrong\u003e18mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS14N-STUCR11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e14\u003c\/strong\u003e14mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eN\u003c\/strong\u003e160mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14 mm\u003c\/td\u003e\n\u003ctd\u003e0.5512 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e160 mm\u003c\/td\u003e\n\u003ctd\u003e6.2992 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003ctd\u003e0.7087 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e130 - 220 m\/min (426 - 721 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e85 - 150 m\/min (278 - 492 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev (0.0023 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e100 - 180 m\/min (328 - 590 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 14mm right-handed core of the S14N-STUCR11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 14mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S14N-STUCR11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S14N-STUCR11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 14mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 14mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 45mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 14mm shank profile is exactly what we needed for clearing narrow internal channels under 20mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e14mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 14mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S14N-STUCR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S14N-STUCR11 is 18mm (0.7087 inches). Trying to bore into holes smaller than 18mm will cause the heavy heel of the 14mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 14mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 14mm bar, maintain your unsupported reach within 42mm to 56mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal right-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618431697068,"sku":"S14N-STUCR11","price":16.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S14N-STUCR11_right_hand_internal_turning_tool_holder_14mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780617151"},{"product_id":"s14n-stucl11","title":"BEYOND S14N-STUCL11 Left Hand Internal Turning Tool Holder | 14mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  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background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S14N-STUCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 14mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 14mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to an 18mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S14N-STUCL11\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for compact internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to an \u003cstrong\u003e18mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS14N-STUCL11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e14\u003c\/strong\u003e14mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eN\u003c\/strong\u003e160mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14 mm\u003c\/td\u003e\n\u003ctd\u003e0.5512 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e160 mm\u003c\/td\u003e\n\u003ctd\u003e6.2992 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003ctd\u003e0.7087 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e130 - 220 m\/min (426 - 721 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e85 - 150 m\/min (278 - 492 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev (0.0023 - 0.0070 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e100 - 180 m\/min (328 - 590 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 14mm left-handed core of the S14N-STUCL11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and aerospace micro-fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 14mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or specialized gang-tool holders. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S14N-STUCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S14N-STUCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 14mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 14mm bar on our sub-spindle to finish bore compact alloy collars. Shocked by how solid it feels at a 45mm overhang depth. Chip clearance is outstanding.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 14mm shank profile is exactly what we needed for clearing narrow internal channels under 20mm diameter. No flexing issues found.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e14mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 14mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S14N-STUCL11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S14N-STUCL11 is 18mm (0.7087 inches). Trying to bore into holes smaller than 18mm will cause the heavy heel of the 14mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 14mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 14mm bar, maintain your unsupported reach within 42mm to 56mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate industrial internal left-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618432286892,"sku":"S14N-STUCL11","price":16.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S14N-STUCL11_left_hand_internal_turning_tool_holder_14mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780584085"},{"product_id":"s16q-stucr11","title":"BEYOND S16Q-STUCR11 Right Hand Internal Turning Tool Holder | 16mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  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background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S16Q-STUCR11 Right-Hand Internal Turning Tool Holder – High-Rigidity 16mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 16mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to a 20mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S16Q-STUCR11\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for small-to-medium diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e20mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS16Q-STUCR11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eQ\u003c\/strong\u003e180mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches (Approx. 5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003ctd\u003e7.0866 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.25 mm\/rev (0.0039 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.20 mm\/rev (0.0031 - 0.0078 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 16mm right-handed core of the S16Q-STUCR11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 16mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S16Q-STUCR11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S16Q-STUCR11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 16mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 16mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 50mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 22mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e16mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 16mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S16Q-STUCR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S16Q-STUCR11 is 20mm (0.7874 inches). Trying to bore into holes smaller than 20mm will cause the heavy heel of the 16mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 16mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 16mm bar, maintain your unsupported reach within 48mm to 64mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 5\/8-inch industrial internal right-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618436055212,"sku":"S16Q-STUCR11","price":18.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S16Q-STUCR11_right_hand_internal_turning_tool_holder_16mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780583770"},{"product_id":"s16q-stucl11","title":"BEYOND S16Q-STUCL11 Left Hand Internal Turning Tool Holder | 16mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  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background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S16Q-STUCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 16mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 16mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 20mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S16Q-STUCL11\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for small-to-medium diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e20mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS16Q-STUCL11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eQ\u003c\/strong\u003e180mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches (Approx. 5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003ctd\u003e7.0866 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.25 mm\/rev (0.0039 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.20 mm\/rev (0.0031 - 0.0078 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 16mm left-handed core of the S16Q-STUCL11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 16mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S16Q-STUCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S16Q-STUCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 16mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 16mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 50mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 22mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e16mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 16mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S16Q-STUCL11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S16Q-STUCL11 is 20mm (0.7874 inches). Trying to bore into holes smaller than 20mm will cause the heavy heel of the 16mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 16mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 16mm bar, maintain your unsupported reach within 48mm to 64mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 5\/8-inch industrial internal left-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618445426860,"sku":"S16Q-STUCL11","price":18.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S16Q-STUCL11_left_hand_internal_turning_tool_holder_16mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780583604"},{"product_id":"s18q-stucr11","title":"BEYOND S18Q-STUCR11 Right Hand Internal Turning Tool Holder | 18mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  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background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S18Q-STUCR11 Right-Hand Internal Turning Tool Holder – High-Rigidity 18mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 18mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to a 23mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S18Q-STUCR11\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for medium-diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e23mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS18Q-STUCR11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e18\u003c\/strong\u003e18mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eQ\u003c\/strong\u003e180mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003ctd\u003e0.7087 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003ctd\u003e7.0866 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 mm\u003c\/td\u003e\n\u003ctd\u003e0.9055 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev (0.0047 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 18mm right-handed core of the S18Q-STUCR11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 18mm round-shank boring bar fits directly into standard CNC lathe turret blocks, heavy boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S18Q-STUCR11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S18Q-STUCR11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for an 18mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 18mm bar on our lathe to bore precision alloy sleeves. Zero vibration issues even when extending out close to 65mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 25mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e18mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 18mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S18Q-STUCR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S18Q-STUCR11 is 23mm (0.9055 inches). Trying to bore into holes smaller than 23mm will cause the heavy heel of the 18mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 18mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 18mm bar, maintain your unsupported reach within 54mm to 72mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces intermediate standards matching industrial internal right-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618446770348,"sku":"S18Q-STUCR11","price":21.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S18Q-STUCR11_right_hand_internal_turning_tool_holder_18mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780583477"},{"product_id":"s20r-stucr11","title":"BEYOND S20R-STUCR11 Right Hand Internal Turning Tool Holder | 20mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 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.beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S20R-STUCR11 Right-Hand Internal Turning Tool Holder – High-Rigidity 20mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 20mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or profiling inside blind holes down to a 25mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S20R-STUCR11\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for small-to-medium diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e25mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS20R-STUCR11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e20\u003c\/strong\u003e20mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e200mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches (Approx. 3\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003ctd\u003e7.8740 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9842 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev (0.0047 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 20mm right-handed core of the S20R-STUCR11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 20mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S20R-STUCR11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S20R-STUCR11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 20mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 20mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 60mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 28mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e20mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 20mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S20R-STUCR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S20R-STUCR11 is 25mm (0.9842 inches). Trying to bore into holes smaller than 25mm will cause the heavy heel of the 20mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 20mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 20mm bar, maintain your unsupported reach within 60mm to 80mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 3\/4-inch industrial internal right-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618453192876,"sku":"S20R-STUCR11","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S20R-STUCR11_right_hand_internal_turning_tool_holder_20mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780583371"},{"product_id":"s20r-stucl11","title":"BEYOND S20R-STUCL11 Left Hand Internal Turning Tool Holder | 20mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  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background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S20R-STUCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 20mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 20mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 25mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S20R-STUCL11\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for small-to-medium diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e25mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS20R-STUCL11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e20\u003c\/strong\u003e20mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e200mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches (Approx. 3\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003ctd\u003e7.8740 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9842 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev (0.0047 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e with premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 20mm left-handed core of the S20R-STUCL11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 20mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S20R-STUCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S20R-STUCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 20mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 20mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 60mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★¼☆☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 28mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e20mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 20mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S20R-STUCL11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S20R-STUCL11 is 25mm (0.9842 inches). Trying to bore into holes smaller than 25mm will cause the heavy heel of the 20mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 20mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 20mm bar, maintain your unsupported reach within 60mm to 80mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 3\/4-inch industrial internal left-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618457649324,"sku":"S20R-STUCL11","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S20R-STUCL11_left_hand_internal_turning_tool_holder_20mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780583318"},{"product_id":"beyond-s25s-stucr11-boring-bar-25mm-cnc-internal-turning-tcmt11","title":"BEYOND S25S-STUCR11 Right Hand Internal Turning Tool Holder | 25mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S25S-STUCR11 Right-Hand Internal Turning Tool Holder – High-Rigidity 25mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 25mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 31mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S25S-STUCR11\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for medium-to-large diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e31mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS25S-STUCR11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e25\u003c\/strong\u003e25mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e250mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9842 inches (Approx. 1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 mm\u003c\/td\u003e\n\u003ctd\u003e9.8425 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e31 mm\u003c\/td\u003e\n\u003ctd\u003e1.2204 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e with premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 25mm right-handed core of the S25S-STUCR11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 25mm round-shank boring bar fits directly into standard CNC lathe turret blocks, heavy boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S25S-STUCR11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S25S-STUCR11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 25mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 25mm bar on our Haas ST-20 to bore alloy sleeves. Zero vibration issues even when extending out close to 90mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 35mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e25mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 25mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S25S-STUCR11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S25S-STUCR11 is 31mm (1.2204 inches). Trying to bore into holes smaller than 31mm will cause the heavy heel of the 25mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 25mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 25mm bar, maintain your unsupported reach within 75mm to 100mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 1-inch industrial internal right-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618471248044,"sku":"S25S-STUCR11","price":33.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S25S-STUCR11_right_hand_internal_turning_tool_holder_25mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780583204"},{"product_id":"beyond-s25s-stucl11-boring-bar-25mm-cnc-internal-turning-tcmt11","title":"BEYOND S25S-STUCL11 Left Hand Internal Turning Tool Holder | 25mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    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font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S25S-STUCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 25mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 25mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 31mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S25S-STUCL11\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for medium-to-large diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e31mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 1102 \/ TCMT 1103\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS25S-STUCL11\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e25\u003c\/strong\u003e25mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e250mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e11mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9842 inches (Approx. 1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 mm\u003c\/td\u003e\n\u003ctd\u003e9.8425 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e31 mm\u003c\/td\u003e\n\u003ctd\u003e1.2204 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 1102xx \/ TCMT 1103xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 2.5(1.5)1 \/ TCMT 2.5(1.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 6\u003c\/td\u003e\n\u003ctd\u003eM2.5 x 0.23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT8\u003c\/td\u003e\n\u003ctd\u003eT8 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.30 mm\/rev (0.0039 - 0.0118 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev (0.0031 - 0.0086 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev (0.0047 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT1102\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 1102 \/ 1103 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 25mm left-handed core of the S25S-STUCL11 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 25mm round-shank boring bar fits directly into standard CNC lathe turret blocks, heavy boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S25S-STUCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S25S-STUCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 25mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 25mm bar on our Haas ST-20 to bore alloy sleeves. Zero vibration issues even when extending out close to 90mm overhang. The pocket fits the TCMT11 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT1102. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 35mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e25mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT11チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Incredible value for high-volume jobs\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 25mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S25S-STUCL11 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S25S-STUCL11 is 31mm (1.2204 inches). Trying to bore into holes smaller than 31mm will cause the heavy heel of the 25mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 25mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 25mm bar, maintain your unsupported reach within 75mm to 100mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 1-inch industrial internal left-hand boring setups or configurations using size 22 triangular indexable inserts (TCMT 2.5(1.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618474361004,"sku":"S25S-STUCL11","price":33.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S25S-STUCL11_left_hand_internal_turning_tool_holder_25mm_steel_boring_bar_for_TCMT1102_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780582584"},{"product_id":"beyond-s16q-stucr16-boring-bar-16mm-cnc-internal-turning-tcmt","title":"BEYOND S16Q-STUCR16 Right Hand Internal Turning Tool Holder | 16mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S16Q-STUCR16 Right-Hand Internal Turning Tool Holder – High-Rigidity 16mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 16mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 20mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S16Q-STUCR16\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for small-to-medium diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e20mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS16Q-STUCR16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eQ\u003c\/strong\u003e180mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches (Approx. 5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003ctd\u003e7.0866 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 16mm right-handed core of the S16Q-STUCR16 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 16mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S16Q-STUCR16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S16Q-STUCR16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 16mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 16mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 55mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT16T3. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 28mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e16mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT16チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 16mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S16Q-STUCR16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S16Q-STUCR16 is 20mm (0.7874 inches). Trying to bore into holes smaller than 20mm will cause the heavy heel of the 16mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 16mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 16mm bar, maintain your unsupported reach within 48mm to 64mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 5\/8-inch industrial internal right-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3(2.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618478522540,"sku":"S16Q-STUCR16","price":18.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S16Q-STUCR16_right_hand_internal_turning_tool_holder_16mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780582480"},{"product_id":"beyond-s16q-stucl16-boring-bar-16mm-cnc-internal-turning-tcmt","title":"BEYOND S16Q-STUCL16 Left Hand Internal Turning Tool Holder | 16mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S16Q-STUCL16 Left-Hand Internal Turning Tool Holder – High-Rigidity 16mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 16mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 20mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S16Q-STUCL16\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for small-to-medium diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e20mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS16Q-STUCL16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eQ\u003c\/strong\u003e180mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 mm\u003c\/td\u003e\n\u003ctd\u003e0.6299 inches (Approx. 5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003ctd\u003e7.0866 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 16mm left-handed core of the S16Q-STUCL16 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for compact cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring smaller hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 16mm round-shank boring bar fits directly into standard CNC lathe turret blocks, compact boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S16Q-STUCL16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S16Q-STUCL16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 16mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 16mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 55mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT16T3. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 28mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e16mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT16チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Incredible value for high-volume jobs\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 16mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S16Q-STUCL16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S16Q-STUCL16 is 20mm (0.7874 inches). Trying to bore into holes smaller than 20mm will cause the heavy heel of the 16mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 16mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 16mm bar, maintain your unsupported reach within 48mm to 64mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 5\/8-inch industrial internal left-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3(2.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618490843308,"sku":"S16Q-STUCL16","price":18.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S16Q-STUCL16_left_hand_internal_turning_tool_holder_16mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780582403"},{"product_id":"beyond-s20r-stucr16-boring-bar-20mm-cnc-internal-turning-tcmt","title":"BEYOND S20R-STUCR16 Right Hand Internal Turning Tool Holder | 20mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S20R-STUCR16 Right-Hand Internal Turning Tool Holder – High-Rigidity 20mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 20mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 25mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S20R-STUCR16\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for medium-diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e25mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS20R-STUCR16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e20\u003c\/strong\u003e20mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e200mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches (Approx. 3\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003ctd\u003e7.8740 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9842 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 20mm right-handed core of the S20R-STUCR16 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 20mm round-shank boring bar fits directly into standard CNC lathe turret blocks, medium boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S20R-STUCR16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S20R-STUCR16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 20mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 20mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 70mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT16T3. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 35mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e20mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT16チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 20mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S20R-STUCR16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S20R-STUCR16 is 25mm (0.9842 inches). Trying to bore into holes smaller than 25mm will cause the heavy heel of the 20mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 20mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 20mm bar, maintain your unsupported reach within 60mm to 80mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 3\/4-inch industrial internal right-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3(2.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618494546092,"sku":"S20R-STUCR16","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S20R-STUCR16_right_hand_internal_turning_tool_holder_20mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780582255"},{"product_id":"beyond-s20r-stucl16-boring-bar-20mm-cnc-internal-turning-tcmt","title":"BEYOND S20R-STUCL16 Left Hand Internal Turning Tool Holder | 20mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    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.beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S20R-STUCL16 Left-Hand Internal Turning Tool Holder – High-Rigidity 20mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 20mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 25mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S20R-STUCL16\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for medium-diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e25mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS20R-STUCL16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e20\u003c\/strong\u003e20mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e200mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e0.7874 inches (Approx. 3\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003ctd\u003e7.8740 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9842 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 20mm left-handed core of the S20R-STUCL16 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Internal Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for medium-sized cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic manifold housings, industrial valve beds, and automotive distribution liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 20mm round-shank boring bar fits directly into standard CNC lathe turret blocks, medium boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S20R-STUCL16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S20R-STUCL16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Superb Rigidity for a 20mm Bar\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 20mm bar on our Haas ST-10 to bore alloy sleeves. Zero vibration issues even when extending out close to 70mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT16T3. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 35mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径加工のビビリが大幅に減少\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e20mm径のシャンクですが剛性が非常に高く、深穴加工の仕上げでもビビリが全く発生しません。TCMT16チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Incredible value for high-volume jobs\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 20mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S20R-STUCL16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S20R-STUCL16 is 25mm (0.9842 inches). Trying to bore into holes smaller than 25mm will cause the heavy heel of the 20mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 20mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 20mm bar, maintain your unsupported reach within 60mm to 80mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 3\/4-inch industrial internal left-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3(2.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618497822892,"sku":"S20R-STUCL16","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S20R-STUCL16_left_hand_internal_turning_tool_holder_20mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780582139"},{"product_id":"beyond-s25s-stucr16-boring-bar-25mm-cnc-internal-turning-tcmt","title":"BEYOND S25S-STUCR16 Right Hand Internal Turning Tool Holder | 25mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 20px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-container {\n    display: block;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S25S-STUCR16 Right-Hand Internal Turning Tool Holder – High-Rigidity 25mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 25mm right-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 32mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S25S-STUCR16\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder precisely engineered for medium-to-large diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e32mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS25S-STUCR16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e25\u003c\/strong\u003e25mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e250mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9843 inches (Approx. 1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 mm\u003c\/td\u003e\n\u003ctd\u003e9.8425 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003ctd\u003e1.2598 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e with premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 25mm right-handed core of the S25S-STUCR16 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Boring Operations:\u003c\/strong\u003e Engineered to complete high-precision internal diameter operations on engine blocks, gear hubs, and custom flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic cylinder housings, industrial gear rings, and automotive transmission liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 25mm round-shank boring bar fits directly into standard CNC lathe turret blocks, medium-to-heavy boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for right-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S25S-STUCR16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S25S-STUCR16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Excellent Sturdiness and Pocket Precision\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 25mm bar on our Haas ST-20 to bore tool steel parts. Zero vibration issues even when extending out close to 90mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei tiefen Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT16T3. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo controllo delle vibrazioni\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 45mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径ボーリング加工のビビリが激減\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e25mm径のシャンク剛性が非常に高く、深穴加工の中荒削りでもビビリが全く発生しません。TCMT16チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 25mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S25S-STUCR16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S25S-STUCR16 is 32mm (1.2598 inches). Trying to bore into holes smaller than 32mm will cause the heavy heel of the 25mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCR) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 25mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 25mm bar, maintain your unsupported reach within 75mm to 100mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 1-inch industrial internal right-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3(2.5)X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618512076972,"sku":"S25S-STUCR16","price":33.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S25S-STUCR16_right_hand_internal_turning_tool_holder_25mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780582025"},{"product_id":"beyond-s25s-stucl16-boring-bar-25mm-cnc-internal-turning-tcmt","title":"BEYOND S25S-STUCL16 Left Hand Internal Turning Tool Holder | 25mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S25S-STUCL16 Left-Hand Internal Turning Tool Holder – High-Rigidity 25mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 25mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside blind holes down to a 32mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S25S-STUCL16\u003c\/strong\u003e is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for medium-to-large diameter internal boring, profiling, and step-turning operations on CNC lathes. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the lathe spindle line to eliminate harmful chatter spikes in deep cavities down to a \u003cstrong\u003e32mm minimum bore entry\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from an ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging or flank-wear rubbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS25S-STUCL16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e25\u003c\/strong\u003e25mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e250mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e0.9843 inches (Approx. 1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 mm\u003c\/td\u003e\n\u003ctd\u003e9.8425 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003ctd\u003e1.2598 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe highly rigid 25mm left-handed core of the S25S-STUCL16 tool holder makes it an excellent choice for a variety of critical internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Deep Hole Boring:\u003c\/strong\u003e Ideal for multi-axis CNC turning centers or dual-spindle setups running left-hand feed profiles for medium-to-large cylindrical workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring mid-sized hydraulic cylinder housings, industrial gear rings, and automotive transmission liners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress or push-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 25mm round-shank boring bar fits directly into standard CNC lathe turret blocks, medium-to-heavy boring bar sleeve blocks, split bushings, or tool blocks. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Citizen, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S25S-STUCL16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S25S-STUCL16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Excellent Sturdiness and Pocket Precision\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 25mm bar on our Haas ST-20 to bore tool steel parts. Zero vibration issues even when extending out close to 90mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität bei tiefen Bohrungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise gearbeiteter Plattensitz für TCMT16T3. Die Klemmschraube hält absolut bombenfest. Der Spanabfluss läuft durch den 93° Winkel optimal aus der Bohrung ab. Sehr zu empfehlen!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo controllo delle vibrazioni\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 45mm bore rings. Delivered quickly with Torx wrench, premium black finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"内径ボーリング加工のビビリが激減\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e25mm径のシャンク剛性が非常に高く、深穴加工の中荒削りでもビビリが全く発生しません。TCMT16チップのホールド感も非常に安定しています。切り粉が綺麗に分断されます。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Incredible value for high-volume job shops\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 25mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S25S-STUCL16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S25S-STUCL16 is 32mm (1.2598 inches). Trying to bore into holes smaller than 32mm will cause the heavy heel of the 25mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 25mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 25mm bar, maintain your unsupported reach within 75mm to 100mm to achieve optimum surface finish and avoid chatter harmonics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 1-inch industrial internal left-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3-2.5-X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618538291372,"sku":"S25S-STUCL16","price":33.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S25S-STUCL16_left_hand_internal_turning_tool_holder_25mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_internal_profiling_operations.jpg?v=1780581906"},{"product_id":"beyond-s32t-stucr16-boring-bar-holder-cnc-internal-turning-tcmt","title":"BEYOND S32T-STUCR16 Right Hand Internal Turning Tool Holder | 32mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  .beyond-h1-holder {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n  }\n  .beyond-h1-holder h1 {\n    margin: 0;\n    font-size: 26px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    color: #ffffff;\n  }\n  .beyond-section {\n    margin-bottom: 35px;\n  }\n  .beyond-section h2 {\n    color: #47479F;\n    border-left: 5px solid #47479F;\n    padding-left: 12px;\n    font-size: 20px;\n    margin-bottom: 15px;\n    font-weight: 600;\n  }\n  .beyond-section h3 {\n    color: #333333;\n    font-size: 16px;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n  .beyond-alert-box {\n    background-color: #fff3cd;\n    border: 1px solid #ffeeba;\n    color: #856404;\n    padding: 15px;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    font-weight: bold;\n  }\n  .beyond-grid-box {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 25px;\n    background-color: #fcfcfd;\n  }\n  .beyond-code-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    flex: 1 1 140px;\n    background-color: #ffffff;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .beyond-code-letter strong {\n    color: #47479F;\n    font-size: 18px;\n    display: block;\n    border-bottom: 1px solid #e0e0e0;\n    padding-bottom: 5px;\n    margin-bottom: 5px;\n  }\n  .beyond-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 15px 0;\n  }\n  .beyond-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n  }\n  .beyond-table th, .beyond-table td {\n    border: 1px solid #dddddd;\n    padding: 12px;\n    text-align: left;\n    font-size: 14px;\n  }\n  .beyond-table th {\n    background-color: #47479F;\n    color: white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S32T-STUCR16 Right-Hand Internal Turning Tool Holder – High-Rigidity 32mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ NOTICE TO MACHINISTS: The indexable carbide insert displayed in our product images is for structural layout demonstrations only and is NOT included with this tool holder. Please purchase your matching right-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which indexable carbide insert and chipbreaker geometry are ideal for deep-hole 32mm right-hand boring bars when machining sticky stainless steel or alloy steels?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S32T-STUCR16\u003c\/strong\u003e is an industrial-grade, right-handed steel-shank internal turning tool holder engineered for large-diameter internal boring, profiling, and step-turning operations on CNC lathes. Utilizing a precise 93-degree approach angle, this heavy-duty tool bar transforms internal cutting dynamics by deflecting cutting forces axially along the lathe spindle line, drastically lowering radial force and eliminating harmful chatter spikes in deep cavities down to a 40mm minimum bore entry. This holder is optimized for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e triangular inserts. When paired with positive rake chipbreaker inserts (such as the polished HF design for smooth finishing or the textured HM\/HM2 geometries for medium-to-rough cutting), it ensures excellent chip breakage. It breaks up long, stringy curls into tight, manageable segments that easily flush out of deep blind holes via standard coolant lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Hardened Alloy Steel:\u003c\/strong\u003e Fabricated from ultra-tough structural spring-steel matrix, thermal-hardened to optimize tensile strength and suppress harmonics at overhang lengths up to 4X shank diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Torque Screw-Down Clamping:\u003c\/strong\u003e Low-profile screw-lock mechanism ensures clear chip evacuation pathways while holding the insert firmly against the pocket floor to prevent micro-shifting under heavy cutting loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Profile:\u003c\/strong\u003e Specifically shaped for deep internal profiling, step counterboring, and clean facing adjustments without flank-wear rubbing or tool body drag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Corrosion Black Surface:\u003c\/strong\u003e Advanced black oxide finish provides excellent wear resistance, preventing rust and micro-welding when continuously exposed to high-pressure water-soluble cutting oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eFor accurate CNC programming configuration, look closely at how the \u003cstrong\u003eS32T-STUCR16\u003c\/strong\u003e standard international nomenclature breaks down into physical dimensions:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Parsing Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e32\u003c\/strong\u003e32mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003e300mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003eRight-Hand Turn\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial Dimensions Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDimension Parameter\u003c\/th\u003e\n\u003cth\u003eMetric System Spec\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003ctd\u003e1.2598 inches (~1-1\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 mm\u003c\/td\u003e\n\u003ctd\u003e11.8110 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003ctd\u003e1.5748 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Insert Geometry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLock Screw Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Drive Key Wrench\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Speed \u0026 Feed Table --\u003e\n\u003ch3\u003eRecommended Machining Parameters Comparison Guide\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Matrix\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon \u0026amp; Structural Steels (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Alloys (304, 316, 420)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrey \u0026amp; Ductile Cast Iron (GG20\/GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need premium matching inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to browse BEYOND Original TCMT 16T3 \/ TCGT 16T3 Indexable Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e featuring advanced chip control layers.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThanks to its heavy 32mm right-handed steel core, the S32T-STUCR16 is an excellent choice for a variety of critical heavy internal turning jobs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Internal Boring:\u003c\/strong\u003e Perfect for machining heavy hydraulic sleeve cylinders, structural machinery components, and valve blocks down to high sub-surface depths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile Counterboring:\u003c\/strong\u003e The 93-degree lead profile allows for intricate contouring paths while maintaining square 90-degree internal corner steps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Lathe Reworks:\u003c\/strong\u003e Offers excellent stiffness when boring out tough weldments or widening heavy forged tube structures on horizontal or vertical CNC beds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Equipment Interface \u0026amp; Structural Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis 32mm round boring bar integrates perfectly into standard CNC turret blocks, split sleeve adapters, and heavy internal boring tool blocks. It works smoothly with a wide range of industrial metal lathes and precision CNC turning machines from global brands like Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, and Hurco, running right-hand internal turning programs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Carbide Grade Matrix Guide\u003c\/h2\u003e\n\u003cp\u003eTo maximize tool life and improve chip formation, select the BEYOND proprietary insert grade that best matches your target metal type:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Coated Substrate):\u003c\/strong\u003e Designed with excellent thermal edge stability. Highly recommended for preventing built-up edge (BUE) on gummy materials like 304\/316 stainless steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Alpha-Al2O3):\u003c\/strong\u003e Thick, highly wear-resistant coating layout. Engineered to handle continuous heat during high-speed, rough-to-medium runs on alloy and carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Matrix):\u003c\/strong\u003e Highly abrasive-resistant composition. Built specifically for stable performance during high-speed wet or dry turning of grey cast iron components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Precision Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eBEYOND manufactures precision tooling for demanding industrial environments. Every single S32T-STUCR16 tool holder goes through rigorous CMM (Coordinate Measuring Machine) inspections to keep pocket tolerances within ±0.01mm, ensuring precise center-height alignment and repeatable accuracy when changing inserts.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Performance Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Zero chatter at high depths!\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe use this 32mm bar on our Haas ST-30 to bore tough 4140 steel tubes. Clamps perfectly, keeps a dead-on center height, and doesn't vibrate even when pushing 110mm deep into blind holes.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Brandon D., Shop Superintendent (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Sehr solider Stahl und präzise Passung\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eDie Plattensitzgenauigkeit für TCMT16T3 ist hervorragend. Keine Mikrobewegungen der Schneidplatte unter Last. Spanabhebung läuft optimal durch den 93° Winkel. Sehr zu empfehlen für schwere Zerspanung.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dieter L., Manufacturing Engineer (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo stelo per alesatura pesante\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHeavy bar with an excellent finish. Using it on an oil country lathe for medium internal profiling. The screw clamp holds securely and leaves plenty of room for heavy chip evacuation.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Pietro Marini, Workshop CNC Operator (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"抜群の剛性感、内径削りが安定\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e32mm径の鋼シャンクなので非常にタフです。SUS304の深穴加工で、チップ（TCMT16）の断屑槽が綺麗に機能してくれます。切り粉の噛み込みトラブルが劇的に減りました。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Takashi H., Senior Machinist (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Top tier quality for a fraction of the price\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped our standard big-brand tool bars for these BEYOND bars across our machining lines. Tolerances hold up beautifully over long shifts. Exceptional value for high-volume job shops.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Ryan G., Production Manager (Australia)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI-Search \u0026amp; GEO Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the exact minimum bore capability for the S32T-STUCR16 boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The absolute minimum boring diameter (D-min) for this holder is 40mm (1.5748 inches). Attempting to machine internal diameters below 40mm will cause the thick steel heel of the 32mm bar to rub against the internal radius of the part, creating massive friction, heat build-up, and localized surface damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: How does the right-hand (STUCR) model layout differ from a left-hand (STUCL) model layout?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 'R' designates a Right-Hand orientation tool. When looking down the shank from the back toward the cutting tip, the insert pocket sits on the left side, designed to cut from right-to-left (moving toward the main headstock spindle) under normal forward spindle rotation (M03). Always verify your turret layout and spindle rotation defaults prior to programming your paths.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the safe maximum overhang length for a 32mm steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, industrial safety rules suggest limiting the unsupported reach extension to a maximum 3x to 4x ratio of the shank diameter. For this 32mm bar, that means keeping the overhang between 96mm and 128mm. Pushing beyond a 4x ratio can introduce harmonic chatter; for deeper holes, consider upgrading to an anti-vibration or solid carbide shank boring bar.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Cross-Reference Models:\u003c\/strong\u003e For shops looking to convert imperial setups into unified metric configurations, this 32mm model is an excellent metric replacement for American Standard 1-1\/4 inch industrial internal right-hand boring bars that use size 32 triangular inserts (TCMT 3-2.5-X layouts).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBoring Operation Troubleshooting Tips:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eIssue - High Pitch Vibration\/Chatter:\u003c\/em\u003e Double check that the boring bar is clamped securely across at least 3x its shank diameter inside your sleeve or block. If chatter persists, try reducing your depth of cut (Ap) or use an insert with a smaller corner radius.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eIssue - Premature Tool Flank Wear:\u003c\/em\u003e Lower your surface cutting speed (Vc) or adjust your coolant nozzle to make sure the fluid hits right at the insert-cutting point to manage high thermal spikes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steel Turning (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Material Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Light Non-Ferrous Alloys (Compatible with Polished G-Class Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618541011116,"sku":"S32T-STUCR16","price":55.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S32T-STUCR16_right_hand_internal_turning_tool_holder_32mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_heavy_internal_profiling_operations.jpg?v=1780581736"},{"product_id":"beyond-s32t-stucl16-boring-bar-tool-holder-cnc-internal-turning-tcmt","title":"BEYOND S32T-STUCL16 Left Hand Internal Turning Tool Holder | 32mm CNC Boring Bar","description":"\u003cstyle\u003e\n  .beyond-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #333333;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 15px;\n    box-sizing: border-box;\n  }\n  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white;\n    font-weight: 600;\n  }\n  .beyond-table tr:nth-child(even) {\n    background-color: #f8f9fa;\n  }\n  .beyond-review-container {\n    display: block;\n  }\n  .beyond-review-card {\n    border: 1px solid #e0e0e0;\n    border-radius: 6px;\n    padding: 15px;\n    margin-bottom: 15px;\n    background-color: #ffffff;\n    box-shadow: 0 2px 4px rgba(0,0,0,0.02);\n  }\n  .beyond-stars {\n    color: #ffc107;\n    margin-bottom: 5px;\n    font-size: 14px;\n  }\n  .beyond-review-meta {\n    font-size: 12px;\n    color: #777777;\n    margin-top: 5px;\n  }\n  .beyond-faq-item {\n    background-color: #f8f9fa;\n    border-left: 4px solid #47479F;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .beyond-faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 5px;\n  }\n  .beyond-badge-container {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 15px;\n  }\n  .beyond-badge {\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n  }\n  .beyond-footer-panel {\n    border-top: 1px solid #e0e0e0;\n    padding-top: 25px;\n    margin-top: 30px;\n  }\n  @media (max-width: 768px) {\n    .beyond-h1-holder h1 { font-size: 20px; }\n    .beyond-section h2 { font-size: 18px; }\n    .beyond-code-letter { flex: 1 1 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003c!-- H1 Product Header --\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S32T-STUCL16 Left-Hand Internal Turning Tool Holder – High-Rigidity 32mm CNC Boring Bar\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT NOTICE BLOCK --\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown in the product images is for structural demonstration purposes only and is NOT included in the tool holder package. Please purchase your compatible left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which 32mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside deep blind holes down to a 40mm minimum bore?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S32T-STUCL16\u003c\/strong\u003e is a heavy-duty, industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for large-diameter, high-depth lathe boring operations on heavy CNC turning centers or sub-spindle setups. This industrial tool holder utilizes an optimized 93-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting vectors axially along the spindle to eliminate harmonic chatter during deep internal profiling runs. Specifically engineered for \u003cstrong\u003eTCMT 16T3 \/ TCGT 16T3\u003c\/strong\u003e indexable carbide inserts, it allows machinists to exploit premium positive rake chipbreaker geometries (such as HF for finishing or HM\/HM2 for medium-to-rough cutting). This setup guarantees superior chip fragmentation, successfully breaking up potential stringy nests when processing sticky alloy steels, hardened carbon steels, and stainless steel matrices inside deep, constrained internal chambers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Hardened Structural Steel:\u003c\/strong\u003e Forged from supreme-quality, high-tensile alloy steel structural matrices, heat-treated to maximize elastic modulus, suppressing vibration up to a 4X shank diameter overhang reach limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Clamping Screw-Down Matrix:\u003c\/strong\u003e Secure low-profile screw-lock setup offers maximum clearance for heavy chip volume evacuation, preventing pocket erosion and insert shifts under high feed velocities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Precision Clearance Angle:\u003c\/strong\u003e Tailored for deep boring, longitudinal profile steps, and multi-directional contouring paths without risk of tool body dragging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Anti-Wear Oxide Finish:\u003c\/strong\u003e Advanced black-oxide skin layer maximizes resistance to thermal scaling and corrosion when continuously exposed to high-pressure water-soluble fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Technical Specifications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Reference\u003c\/h2\u003e\n\u003cp\u003eEnsuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the \u003cstrong\u003eS32T-STUCL16\u003c\/strong\u003e standard international nomenclature rules:\u003c\/p\u003e\n\u003c!-- Model Code Breakdown Box --\u003e\n\u003cdiv class=\"beyond-grid-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 10px;\"\u003eISO Nomenclature Verification Structure:\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-breakdown\"\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eSteel Shank\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e32\u003c\/strong\u003e32mm Shank Dia.\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003e300mm Length\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003eScrew Lock System\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eT\u003c\/strong\u003eTriangular Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eU\u003c\/strong\u003e93° Approach\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e7° Clearance\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003eLeft-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e16\u003c\/strong\u003e16mm Edge Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Metric vs Imperial \u0026 Models Comparison Table --\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter Dimension\u003c\/th\u003e\n\u003cth\u003eMetric System Specification\u003c\/th\u003e\n\u003cth\u003eImperial Equivalent Measurement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShank Diameter (d)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003ctd\u003e1.2598 inches (Approx. 1-1\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Tool Length (L)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 mm\u003c\/td\u003e\n\u003ctd\u003e11.8110 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Bore Diameter (D-min)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003ctd\u003e1.5748 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Carbide Insert Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T3xx \/ TCGT 16T3xx\u003c\/td\u003e\n\u003ctd\u003eTCMT 3(2.5)1 \/ TCMT 3(2.5)2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamping Screw Model Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 10\u003c\/td\u003e\n\u003ctd\u003eM4.0 x 0.39 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorx Key Driver Wrench Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT15\u003c\/td\u003e\n\u003ctd\u003eT15 Torx Wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Recommended Cutting Parameters Table --\u003e\n\u003ch3\u003eRecommended Technical Machining Parameters (Speed \u0026amp; Feed Guide)\u003c\/h3\u003e\n\u003cdiv class=\"beyond-table-wrapper\"\u003e\n\u003ctable class=\"beyond-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Classification\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc) Range\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f) Per Revolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Alloy Steel (HB180-280)\u003c\/td\u003e\n\u003ctd\u003e140 - 240 m\/min (459 - 787 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.35 mm\/rev (0.0039 - 0.0137 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Matrix (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e90 - 160 m\/min (295 - 525 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.25 mm\/rev (0.0031 - 0.0098 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG20, GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e110 - 190 m\/min (360 - 623 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.40 mm\/rev (0.0047 - 0.0157 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Insert Purchase Internal Link Box --\u003e\n\u003cdiv style=\"border-style: dashed; background-color: #f4f4fa; text-align: center; padding: 15px;\" class=\"beyond-grid-box\"\u003e🔗 Need matching high-performance turning inserts?\u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=TCMT16T3\" target=\"_blank\" rel=\"noopener\"\u003e \u003cspan style=\"color: #47479f;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eClick here to shop BEYOND Original TCMT 16T3 \/ TCGT 16T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e with premium chipbreaker matrices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Product Applications --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe heavy 32mm left-handed geometry of the S32T-STUCL16 tool holder makes it highly effective for rigid internal processing across diverse turning operations:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Deep Hole Boring:\u003c\/strong\u003e Ideal for heavy-duty CNC lathes or dual-spindle multi-axis centers running left-hand feed profiles for large tubular forgings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Internal Profiling:\u003c\/strong\u003e Delivers exceptional support for boring structural hydraulic cylinders, large industrial gear rings, and automotive transmission sleeves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongitudinal Step-Boring:\u003c\/strong\u003e The 93-degree lead configuration allows seamless pocket-turning transitions down internal right-angle walls with near-zero radial stress.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThis 32mm round-shank boring bar fits directly into standard CNC lathe turret tool holders, heavy-duty boring bar sleeve blocks, split adapters, or boring heads. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Doosan\/DN Solutions, Mori Seiki, Okuma, Makino, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Material\/Grade Comparison (BEYOND Brand Internal) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003eTo maximize chip control and wear life, pair your S32T-STUCL16 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Nano-Coated):\u003c\/strong\u003e Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304\/316 stainless steel matrices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (CVD Multi-Layer Coated):\u003c\/strong\u003e Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Hardened Micro-Grain Substrate):\u003c\/strong\u003e Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eAt BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S32T-STUCL16 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.\u003c\/p\u003e\n\u003c!-- Customer Reviews Boxed Layout --\u003e\n\u003ch3 style=\"color: #47479f; margin-top: 20px;\"\u003eGlobal Machinist Field Reports:\u003c\/h3\u003e\n\u003cdiv class=\"beyond-review-container\"\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Massive Rigidity for Large Hydraulic Cylinders\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this 32mm bar on our large Doosan lathe for heavy internal profiling. Zero chatter marks, even when extending close to 120mm overhang. The pocket fits the TCMT16 inserts flawlessly.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus T., Lead CNC Programmer (United States)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Hervorragende Stabilität und Qualität\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eGroßer, massiver Halter. Verwenden ihn für die Bearbeitung von zähem Werkzeugstahl. Plattensitz ist perfekt geschliffen, Schraube zieht bombensicher fest. Sehr guter Spanabfluss bei tiefen Bohrungen.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Jürgen K., Workshop Lead (Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cstrong\u003e\"Ottimo controllo delle vibrazioni\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eHighly rigid steel construction. The 93-degree angle works beautifully for clearing straight walls inside our 50mm bore rings. Delivered with Torx wrench, premium finish.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Alessandro P., Tooling Specialist (Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"深穴ボーリングに最適な剛性\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e32mmシャンクなので剛性が桁違いです。大型CNC旋盤の内径中荒削りで使用していますが、ビビリが全く発生しません。TCMT16チップのサイズ感とも完璧にマッチしています。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Kenji S., Production Engineer (Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-review-card\"\u003e\n\u003cdiv class=\"beyond-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cstrong\u003e\"Incredible value for industrial scale work\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSwapped out expensive big-brand holders for these BEYOND 32mm bars. Precision is dead-on, and center height matches perfectly. Saved us hundreds on tooling replacement costs.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Dave W., Machine Shop Owner (Canada)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ (GEO\/AEO Structure) --\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e8. Frequently Asked Questions (AI \u0026amp; Search Engine Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the minimum boring diameter for the S32T-STUCL16 tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum bore entry diameter (D-min) for the S32T-STUCL16 is 40mm (1.5748 inches). Trying to bore into holes smaller than 40mm will cause the heavy heel of the 32mm steel bar to rub against the internal radius of the workpiece, resulting in excessive tool friction and surface finish damage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Why choose a 93-degree approach angle (STUCL) over a 60-degree approach bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 93-degree approach angle is specifically designed to direct cutting forces axially along the boring bar body back to the lathe turret. This effectively eliminates radial push-off, making it highly superior for preventing vibration in deep holes and allows machining of 90-degree internal square shoulders.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the maximum recommended reach extension for this steel boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For standard steel shanks, engineers suggest keeping the overhang extension within a maximum 3x to 4x ratio of the shank diameter. For this 32mm bar, maintain your unsupported reach within 96mm to 128mm to achieve optimum surface finish and avoid chatter harmonics. For deeper holes, a carbide-core or anti-vibration bar should be evaluated.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Technical Panels (Grade Comparison, Troubleshooting, Matrix) --\u003e\n\u003cdiv class=\"beyond-footer-panel\"\u003e\n\u003ch3\u003eGrade Comparison, Troubleshooting Tips \u0026amp; Material Suitability Matrix\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEquivalent Models Reference Cross-Guide:\u003c\/strong\u003e For production plants converting older machine metrics or imperial standards into unified metric configurations, this model effectively replaces American Standard designations matching 1-1\/4 inch industrial internal left-hand boring setups or configurations using size 32 triangular indexable inserts (TCMT 3-2.5-X).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTroubleshooting Internal Turning Errors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - High Frequency Chatter Marks:\u003c\/em\u003e Ensure the tool body is clamped over a length of at least 3x its shank diameter inside the sleeve. If resonance persists, decrease the nose radius of your insert or reduce the depth of cut (Ap).\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Rapid Flank Edge Wear:\u003c\/em\u003e Decrease your surface cutting speed (Vc) or check that your coolant jet is striking directly into the internal pocket interface to stabilize thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWorkpiece Material Suitability Matrix:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"beyond-badge-container\"\u003e\n\u003cdiv class=\"beyond-badge\"\u003eP - Carbon \u0026amp; Alloy Steels (Fully Optimized)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Matrices (Highly Suitable Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Aluminum \u0026amp; Non-Ferrous Alloys (Compatible with Polished Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618542977196,"sku":"S32T-STUCL16","price":55.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S32T-STUCL16_left_hand_internal_turning_tool_holder_32mm_steel_boring_bar_for_TCMT16T3_carbide_inserts_CNC_lathe_heavy_internal_profiling_operations.jpg?v=1780581517"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/collections\/STUCR_54e11c02-902e-4abf-b173-abf4dddc0354.jpg?v=1764991321","url":"https:\/\/cnchome-beyond.com\/collections\/stucr-l-internal.oembed?page=2","provider":"CNCHome-Beyond","version":"1.0","type":"link"}