{"product_id":"beyond-s25s-sskcl09-boring-bar-holder","title":"BEYOND S25S-SSKCL09 Boring Bar | 25mm CNC Lathe Left Hand Internal Turning Tool Holder for SCMT 09T3 Inserts","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  *, *::before, *::after {\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    font-size: 14px;\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    text-align: left;\n    margin-top: 15px;\n  }\n  .beyond-code-letter {\n    border: 1px solid #47479F;\n    border-radius: 4px;\n    padding: 10px;\n    width: 135px;\n    display: inline-block;\n    vertical-align: top;\n    margin: 5px;\n    background-color: #ffffff;\n    text-align: center;\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    margin-top: 15px;\n  }\n  .beyond-badge {\n    display: inline-block;\n    background-color: #47479F;\n    color: white;\n    padding: 6px 12px;\n    border-radius: 20px;\n    font-size: 13px;\n    font-weight: 500;\n    margin: 4px;\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 { width: 45%; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"beyond-container\"\u003e\n\u003cdiv class=\"beyond-h1-holder\"\u003e\n\u003ch1\u003eBEYOND S25S-SSKCL09 Boring Bar – 25mm Left Hand Steel Screw Locking CNC Lathe Internal Turning Tool Holder\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert seated on the cutting head in our product imagery is for structural demonstration and mounting orientation purposes only. It is NOT included in the boring bar package. Please purchase your matching left-hand or neutral inserts separately.\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which left-hand 25mm boring bar provides the ultimate chip clearance and structural stability for counter-spindle deep hole turning with SCMT 09T3 inserts?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S25S-SSKCL09\u003c\/strong\u003e is a high-grade, precision-manufactured \u003cstrong\u003eSolid Alloy Steel Left Hand Internal Turning Boring Bar\u003c\/strong\u003e engineered for sub-spindle operations, back-boring cycles, and reverse-rotation internal machining on CNC lathes. Featuring a highly versatile \u003cstrong\u003e25mm shank diameter\u003c\/strong\u003e and a \u003cstrong\u003e250mm total length\u003c\/strong\u003e, this tool holder achieves the optimal equilibrium between compact bore accessibility and rigid anti-deflection mass. It is specifically built for machine configurations requiring left-hand tool offsets, providing an absolute defense against harmonic micro-chatter during extended multi-pass internal cycles.\u003c\/p\u003e\n\u003cp\u003eThis premium tool holder is meticulously milled to secure standard \u003cstrong\u003eSCMT 09T3 \/ SCGT 09T3\u003c\/strong\u003e indexable square carbide inserts. The integration of a 75-degree approach angle strategically converts radial tool deflection into axial forces directed straight down the 25mm alloy steel shank. When paired with high-performance coated substrates featuring molded positive-rake chipbreaker channels, the assembly effortlessly slices through resilient material grains. The specialized insert pocket orientation guarantees sudden, effective chip breaking, turning long, continuous stringy ribbons into compact, manageable swarf coils that lift out smoothly from the internal clearance zone without binding the tool or scratching critical surface finishes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecialized Left-Hand (LH) Geometry:\u003c\/strong\u003e Dedicated configuration for counter-spindle setups, backward tool pathing, and unique clock-wise spindle operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInduction Hardened Alloy Steel Body:\u003c\/strong\u003e Thermal-treated steel matrix maximizes fatigue limit thresholds, delivering consistent structural dampening under heavy chip loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75° Side Cutting Approach Angle:\u003c\/strong\u003e Minimizes dangerous radial tool pushback, stabilizing your boring passes and ensuring excellent geometric straightness without tapering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Profile Insert Screw Locking:\u003c\/strong\u003e Uses an ultra-secure M3.5 Torx screw system that removes the need for clumsy top clamps, maximizing the space inside the bore for smooth chip flow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Nomenclature Cross-Guide\u003c\/h2\u003e\n\u003cp\u003eAbsolute geometric clarity is required for accurate CNC tool offsets. Below is the precise international ISO classification breakdown for the \u003cstrong\u003eS25S-SSKCL09\u003c\/strong\u003e model:\u003c\/p\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 Diameter\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\u003eS\u003c\/strong\u003eSquare Insert\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e75° 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 Cut\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e09\u003c\/strong\u003e9.525mm Edge Size\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 (Commonly run within standard 1.00-inch imperial split sleeves)\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 (Standard format optimized for versatile boring cycles)\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 (Excellent clearing profile for tight internal steps)\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\u003eSCMT 09T3xx \/ SCGT 09T3xx\u003c\/td\u003e\n\u003ctd\u003eSCMT 3(2.5)1 \/ SCMT 3(2.5)2 (3\/8\" IC Square Size, 3.97mm Thick)\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\u003eM3.5 x 9.0\u003c\/td\u003e\n\u003ctd\u003eM3.5 x 0.3543 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\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 - 210 m\/min (426 - 689 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\u003eStainless Steel Matrix (304, 316, 420)\u003c\/td\u003e\n\u003ctd\u003e75 - 140 m\/min (246 - 459 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev (0.0024 - 0.0071 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Grades (GG25, GGG40)\u003c\/td\u003e\n\u003ctd\u003e90 - 170 m\/min (295 - 558 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\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=SCMT09T3\" 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 SCMT 09T3 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/a\u003ewith optimized chipbreaker configurations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe compact yet highly rigid 25mm left-hand configuration makes the S25S-SSKCL09 irreplaceable in several specialized machining fields:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Sub-Spindle Internal Turning:\u003c\/strong\u003e Specifically designed to execute mirror-image profiling and front-face boring on multi-tasking mill-turn center sub-spindles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack-Boring Internal Step Features:\u003c\/strong\u003e Perfect for pulling back towards the turret to create internal retention lips or locking rings without tool collision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-Bore Steel Sleeves:\u003c\/strong\u003e Extensively utilized for high-accuracy boring inside automotive gear assemblies, bearing housings, and custom adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e5. Compatibility \u0026amp; Equipment Interface\u003c\/h2\u003e\n\u003cp\u003eThe ground 25mm cylindrical shank fits perfectly into standard metric CNC lathe turrets, VDI\/BMT static block receivers, and live-tool setups. When integrated into imperial workshops, it aligns perfectly using standard 1.00-inch imperial split reduction sleeves. It operates flawlessly across industry-leading CNC machines, including Haas, Mazak, Doosan\/DN Solutions, Okuma, Citizen, and Nakamura-Tome mill-turn centers configured for left-hand offsets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e6. BEYOND Premium Substrate \u0026amp; Grade Selection Matrix\u003c\/h2\u003e\n\u003cp\u003ePair your S25S-SSKCL09 boring bar with the appropriate BEYOND insert grade to maximize tool life and master chip breakages:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Coated Substrate):\u003c\/strong\u003e Structured with micro-hard TiAlN coatings. Optimized to stop built-up edges (BUE) on sticky materials like 304 stainless steel and high-temp titanium alloys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (Premium CVD Dual-Coated):\u003c\/strong\u003e Built with thick multi-layer Al2O3 + TiN coating lines. The benchmark standard for continuous, high-speed internal roughing passes on carbon structural steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Ultra-Dense Micro-Grain):\u003c\/strong\u003e Formulated for maximum abrasive wear resistance. Custom-engineered for high-speed internal profiling of abrasive grey and ductile cast iron parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-section\"\u003e\n\u003ch2\u003e7. Why Choose BEYOND Tooling Systems\u003c\/h2\u003e\n\u003cp\u003eBEYOND engineering focuses heavily on micro-geometric consistency. The S25S-SSKCL09 boring bar undergoes strict multi-axis CNC milling and automated vacuum induction hardening. By keeping our insert pocket seating tolerances within a hyper-precise ±0.01mm threshold, we completely prevent micro-shifting during sudden shock loads. This ensures total predictability for your production line, significantly reducing scrap rates across extended automated runs.\u003c\/p\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\"Perfect fit for our dual-spindle back-boring passes\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe were struggling to find a rigid 25mm left-hand bar for a sub-spindle job on our Nakamura lathe. This BEYOND bar was a drop-in match. Held absolute size tolerances across a 1,200-part run of alloy sleeves with zero micro-chatter.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Brandon S., Turret Setup Engineer (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 Qualität für Linkshänder-Anwendungen\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSehr präzise verarbeitet. Der Plattensitz für das SCMT 09T3 ist absolut spielfrei. Die Spanabfuhr bei Sacklochbohrungen ist dank der flachen Bauweise der Schraubenklemmung genial. Kein Spänestau mehr.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Holger W., Toolroom Supervisor (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\"Ottima barra sinistra da 25mm, molto rigida\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSolid alloy steel layout. We mount it inside a 1-inch reduction bush on our Haas ST20. The 75-degree approach successfully shifts force into the spindle axle, ensuring perfectly round internal steps.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Matteo G., Senior Programmer (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\"サブスピンドルでの内径加工にビビりなし\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eSCMT 09T3チップがピタリと収まります。250mmの全長でも、適切な切削条件（f=0.15mm\/rev）をかければ全くビビりません。仕上げ面粗度が大幅に向上しました。お勧めします。\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Takashi Y., CNC Cell Operator (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\"Flawless swap with zero offset drift\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWhen changing inserts mid-shift, the pocket alignment is spot on. We don't even have to re-probe the X-axis offset. Incredible build consistency from BEYOND.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— George H., Aerospace Turning Machinist (United Kingdom)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 mechanical difference between an SSKCR and an SSKCL boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The 'R' designation stands for Right-Hand cut, whereas the 'L' in \u003cstrong\u003eS25S-SSKCL09\u003c\/strong\u003e designates a \u003cstrong\u003eLeft-Hand tool structure\u003c\/strong\u003e. Left-hand bars are structurally mirrored, designed specifically for lathes where the cutting action occurs on the opposite side of the centerline, or during specialized reverse spindle rotation or sub-spindle turning sequences.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: What is the absolute minimum bore entry diameter for this 25mm tool holder?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The minimum clear operating bore diameter (D-min) is \u003cstrong\u003e32mm (1.2598 inches)\u003c\/strong\u003e. If you attempt to program this tool inside an internal diameter smaller than 32mm, the back relief heel of the left-handed boring head will rub heavily against the inside walls, leading to instant insert breakage and part destruction.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-item\"\u003e\n\u003cdiv class=\"beyond-faq-q\"\u003eQ: Can I use imperial SCMT 3(2.5)2 inserts on this metric S25S-SSKCL09 tool body?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: Yes. The metric designation '09' refers to a 9.525mm cutting edge length, which is identical to the 3\/8\" Inscribed Circle (IC) standard used in imperial \u003cstrong\u003eSCMT 3(2.5)x\u003c\/strong\u003e inserts. Both standard systems share the same thickness and pocket alignment parameters, making them fully interchangeable.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 In standard North American imperial machine catalogs, a 25mm metric tool body serves as a direct, high-precision alternative to a 1.00-inch (1\") imperial left-hand boring bar when utilizing generic imperial split reduction bush systems.\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 - Rapid Edge Flaking \/ Chipping:\u003c\/em\u003e Ensure your center height alignment is calibrated perfectly on the spindle center. For left-hand setups, being even 0.1mm above or below center radically alters the effective clearance angle, increasing friction and chipping the carbide tip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Chip Bird-Nesting inside Bore:\u003c\/em\u003e SCMT square inserts require positive forward feed energy to trigger the chipbreaker groove. If your chips are nesting, increase the feed rate (f) slightly or choose a specialized positive-ground chipbreaker geometry.\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; Structural Alloy Steels (Fully Optimized Setup)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Alloys \u0026amp; Duplex (Highly Suitable Application)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast and Ductile Irons (Excellent Wear Resistance)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Non-Ferrous Alloys \u0026amp; Aluminum (Compatible with Ground\/Polished SCGT Inserts)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43618176073900,"sku":"S25S-SSKCL09","price":33.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S25S-SSKCL09_left_hand_boring_bar_25mm_alloy_steel_shank_for_SCMT09T3_indexable_carbide_turning_inserts_anti_vibration.jpg?v=1780883668","url":"https:\/\/cnchome-beyond.com\/products\/beyond-s25s-sskcl09-boring-bar-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}