{"product_id":"s25s-ssscr12-heavy-duty-boring-bar-tool-holder","title":"BEYOND S25S-SSSCR12 Heavy Duty Boring Bar | 25mm CNC Lathe Internal Turning Tool Holder for SCMT 1204 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-SSSCR12 Heavy Duty Boring Bar – 25mm High Rigidity Screw Clamping Internal Lathe Turning Tool Holder\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"beyond-alert-box\"\u003e⚠️ PLEASE NOTE: The indexable carbide insert shown seated on the tool head in our product photography is for structural demonstration purposes only. It is NOT included in the tool holder package. Please purchase your compatible right-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 heavy-duty indexable boring bar is best optimized for medium-diameter deep hole internal roughing and high-feed profiling using SCMT 1204 square inserts?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S25S-SSSCR12\u003c\/strong\u003e is an industrial-grade, precision-engineered \u003cstrong\u003eSolid Alloy Steel Internal Turning Boring Bar\u003c\/strong\u003e developed specifically to bridge the gap between compact tool paths and heavy-duty stock removal. Featuring a rigid \u003cstrong\u003e25mm shank diameter\u003c\/strong\u003e and a \u003cstrong\u003e250mm standard length\u003c\/strong\u003e, this right-hand tool holder is structurally optimized to hold up against high cutting forces without geometric deflection. Unlike smaller holders, the S25S size is modified with an enlarged, heavy pocket head designed to host massive \u003cstrong\u003eSCMT 1204 \/ SCGT 1204\u003c\/strong\u003e (1\/2\" Inscribed Circle) square inserts, making it an exceptional performer for deep structural boring cycles on high-tensile steels and cast iron alloy structures.\u003c\/p\u003e\n\u003cp\u003eThe performance secret lies in the marriage of the tool's 75° approach angle and the robust cross-section of the SCMT 1204 square insert. The square insert shape yields a thick carbide substrate backbone that absorbs heavy mechanical shock. When paired with specialized ground-in positive rake chipbreaker geometries, it cleanly shears stringy metal layers. The optimized chip groove structure forces instant curling and fracturing of long ribbons into small, easily manageable chips, ensuring flawless chip evacuation through the internal bore exit and preventing catastrophic chip re-cutting errors.\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\u003eEnlarged SCMT 1204 Pocket Head:\u003c\/strong\u003e Holds large 12mm-edge square carbide inserts, providing double the structural mass of 09-sized insert heads for high depth-of-cut (DOC) processing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Hardened Alloy Steel Shank:\u003c\/strong\u003e Quenched and tempered under precise thermal monitoring to ensure high surface hardness and outstanding vibration-damping properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75° Strategic Lead Angle:\u003c\/strong\u003e Minimizes radial push-off forces by directing cutting impact axially into the lathe spindle, dramatically reducing chatter marks on extended overhangs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Clamping Force Screw Lock:\u003c\/strong\u003e Employs a low-profile Torx screw lock layout that ensures unhindered chip flows while providing secure, movement-free insert retention during interrupted cuts.\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 Reference\u003c\/h2\u003e\n\u003cp\u003eAccurate parameter verification is vital for flawless CNC code execution. Below is the structural decoding of the \u003cstrong\u003eS25S-SSSCR12\u003c\/strong\u003e standard international ISO designation rules:\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\u003eS\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\u003eR\u003c\/strong\u003eRight-Hand Direction\u003c\/div\u003e\n\u003cdiv class=\"beyond-code-letter\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e12mm 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 (Fits directly into standard 1\" turret blocks\/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 (Optimized for deep internal cavity reach)\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\u003eSCMT 1204xx \/ SCGT 1204xx\u003c\/td\u003e\n\u003ctd\u003eSCMT 431 \/ SCMT 432 \/ SCMT 433 (1\/2\" IC Square Size)\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 0.3937 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 - 220 m\/min (426 - 721 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.15 - 0.45 mm\/rev (0.0059 - 0.0177 IPR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel Alloys (304, 316, 410)\u003c\/td\u003e\n\u003ctd\u003e80 - 150 m\/min (262 - 492 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\u003ctr\u003e\n\u003ctd\u003eCast Iron \/ Nodular Iron Grades\u003c\/td\u003e\n\u003ctd\u003e100 - 180 m\/min (328 - 590 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.18 - 0.50 mm\/rev (0.0070 - 0.0196 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 heavy-feed turning inserts? \u003ca href=\"https:\/\/cnchome-beyond.com\/search?q=SCMT1204\" 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 1204 Carbide Inserts\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e featuring reinforced cutting edges.\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 unique balance of a 25mm mid-size shank with a large SCMT 12-size pocket turns the S25S-SSSCR12 into an internal roughing beast across multiple sectors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-Scale Internal Rough Boring:\u003c\/strong\u003e Ideal for processing pre-drilled or cast holes starting from 32mm up to larger structural inner walls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive \u0026amp; Mechanical Components:\u003c\/strong\u003e Heavily deployed in machining structural wheel hubs, custom drive-shaft sleeve cavities, and medium industrial valve linings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupted Cut Turning:\u003c\/strong\u003e The broad, heavy base of the SCMT 1204 insert corner handles structural interruptions (like keyways or oil ports) beautifully without chipping the carbide edge.\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 turret tooling stations, VDI holders, and specialized boring bar sleeves. It is fully cross-compatible with 1-inch imperial tool slot systems using standard reduction adapters. It integrates flawlessly with global CNC lathes from brands like Haas (ST-20\/25), Mazak, Doosan\/DN Solutions, Okuma, and manual lathe quick-change tool posts tailored for high-accuracy right-hand cutting applications.\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-SSSCR12 boring bar with the correct BEYOND insert grade to optimize tool life and secure optimal chip control:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM11 Grade (PVD Coated Substrate):\u003c\/strong\u003e Multi-layered TiAlN matrix built on a high-toughness substrate. Outstanding at resisting built-up edges (BUE) on heat-resistant alloys and 304\/316 stainless steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYM25 Grade (Premium CVD Dual-Coated):\u003c\/strong\u003e Features a specialized Al2O3 + TiN layered coating. Engineered for high-speed, continuous rough-to-medium turning cycles in hard carbon steels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBYK15 Grade (Ultra-Dense Micro-Grain):\u003c\/strong\u003e Offers superior abrasion resistance line profiles. The absolute top choice for machining grey and ductile cast irons with zero edge erosion.\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\u003eAt BEYOND, we build for structural persistence. The S25S-SSSCR12 undergoes precision multi-stage induction hardening and computer-guided pocket milling. By maintaining strict ±0.01mm pocket seat boundaries, we eliminate insert micro-movements under intense tool pressure. This ensures predictable tool wear patterns, giving your CNC workshop maximum operational security and repeatable sizing across multi-shift batches.\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\"The best bar for taking deep cuts in small bores\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eMost 25mm bars only hold small inserts that break when you push them. This BEYOND bar holding a massive SCMT 1204 insert is a complete game-changer. I am pulling out 3mm of material per pass in 1045 steel with zero chatter. Highly recommended!\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Marcus J., Shop Foreman (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\"Absolut spitze für zähen Guss\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eDie S25S Bohrstange läuft auf unserer CNC-Drehmaschine absolut vibrationsfrei. Die SCMT 1204 Wendeplatten sitzen bombenfest in der gehärteten Tasche. Erstklassige Qualität aus dem Hause BEYOND.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Klaus W., Machinist Specialist (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 rigidezza torsionale\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eUtensile robusto e preciso. Lo utilizziamo principalmente per la sbozzatura interna di manicotti metallici. Ottima evacuazione dei trucioli grazie al design ribassato della vite Torx.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Giordano P., CNC Technician (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\"SCMT 1204が使える25mmシャンクで剛性最強です\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003e内径の荒引き加工用に重宝しています。25mmシャンクでありながら、大型の12サイズチップが載るため刃先強度が抜群です。鋳物の断続切削でもチップが欠けることなく、安定して削り落とせます。\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\"Punishing rougher with long pocket lifespan\"\u003c\/strong\u003e\n\u003cp style=\"margin: 5px 0;\"\u003eWe run this bar setup daily on our Haas ST-20. The black oxide finish stands up well against aggressive synthetic water coolants. The insert seat stays square and sharp even after accidental overloads.\u003c\/p\u003e\n\u003cdiv class=\"beyond-review-meta\"\u003e— Brad D., Operations Manager (Canada)\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: Can I use SCMT 09T3 inserts on the BEYOND S25S-SSSCR12 boring bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: No, you cannot. This boring bar is exclusively designed with a larger pocket seat matching \u003cstrong\u003eSCMT 1204xx\u003c\/strong\u003e inserts (12mm cutting edge length). It cannot accept 09-sized inserts. If you need a bar for 09 size inserts, please review our S25S-SSSCR09 tool holder options instead.\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 tool bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: The absolute minimum safe entry bore diameter (D-min) is \u003cstrong\u003e32mm (1.26 inches)\u003c\/strong\u003e. Due to the reinforced tool head carrying the massive SCMT 12 insert, entering any bore smaller than 32mm will cause the tool's heel steel structure to rub against the internal diameter wall, degrading surface quality or cracking the insert.\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 overhang for this solid steel tool bar?\u003c\/div\u003e\n\u003cdiv class=\"beyond-faq-a\"\u003eA: For high-rigidity solid steel shanks like the S25S, the ideal operating overhang ratio is within \u003cstrong\u003e3 times the diameter (3xD)\u003c\/strong\u003e, which equals a maximum overhang depth of roughly 75mm. Extending past 4xD depth can trigger vibration frequencies, requiring a reduction in cutting speed or feed values.\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 tooling structures, this 25mm metric tool holder acts as a high-strength direct alternative for standard 1-inch diameter indexable boring bars running size 4-3 square carbide inserts (frequently cataloged as S16S-SSSCR4 configurations in US tool rooms).\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 - Severe Surface Chatter Marks \/ Piercing Squeal:\u003c\/em\u003e Check that the center height of your tool tip is exactly parallel with the spindle rotation centerline. Additionally, make sure your tool clamp length is at least 3 to 4 times the shank diameter inside the turret split sleeve block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eProblem - Chip Nesting \/ Long Stringy Ribbon Formation:\u003c\/em\u003e The large SCMT 1204 insert needs adequate cutting pressure to engage its chipbreaker groove. Try increasing your feed rate (f) slightly or choosing an insert chip groove designed specifically for medium-to-rough profiling arrays.\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)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eM - Stainless Steel Alloys \u0026amp; Alloys Duplex (Highly Suitable)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eK - Cast Iron, Grey \u0026amp; Ductile Formulations (Excellent Wear Lifetime)\u003c\/div\u003e\n\u003cdiv class=\"beyond-badge\"\u003eN - Non-Ferrous Metals \u0026amp; Aluminum Alloys (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":43618215657644,"sku":"S25S-SSSCR12","price":34.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S25S-SSSCR12_heavy_duty_internal_turning_boring_bar_25mm_solid_steel_shank_for_SCMT120408_indexable_carbide_inserts_CNC_lathe_machining.jpg?v=1780730714","url":"https:\/\/cnchome-beyond.com\/products\/s25s-ssscr12-heavy-duty-boring-bar-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}