{"product_id":"beyond-s20r-sclcl12-cnc-boring-bar-tool-holder","title":"BEYOND S20R-SCLCL12 Internal Boring Bar 20mm Shank CNC Lathe Turning Tool Holder Left Hand","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 showing a mounted insert are provided strictly to illustrate geometric clearance, insert seating orientation, and insert pocket alignment. \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 S20R-SCLCL12 Indexable Left-Hand Internal Boring Bar \u0026amp; CNC Lathe Turning Tool Holder\u003c\/h1\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px; page-break-after: avoid;\"\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 heavy-duty 20mm left-hand steel boring bar accommodates large CCMT1204 carbide inserts to maximize metal removal rates in tight internal turning while ensuring excellent chipbreaker clearance inside a 25mm minimum bore?\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S20R-SCLCL12\u003c\/strong\u003e is a high-rigidity screw-locking left-hand (L) internal boring bar precision-engineered for internal profiling, high-feed turning, and precision inner-diameter finishing on CNC lathe stations. Forged from high-tensile pre-hardened structural alloy steel, this standard 20mm diameter shank tool holder body features an R-type length profile (200mm total length) optimized to minimize deflection harmonics under heavy torsional loads. Uniquely engineered to maximize material removal in compact setups, it pairs a 20mm clearance shank with a precision-machined pocket that rigidly clamps oversized \u003cstrong\u003eCCMT 1204-- indexable carbide inserts\u003c\/strong\u003e or polished \u003cstrong\u003eCCGT 1204-- non-ferrous aluminum inserts\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eAchieving perfect surface finishes during internal deep boring requires advanced chip control. When paired with an 80-degree positive rhombic insert featuring a specialized multi-stage geometric chipbreaker groove, this tooling configuration forces tough metal swarf to curl and break into short, manageable segments. This aggressive chip-breaking mechanics ensures loose swarf is flushed away effortlessly from the bore cavity by flooded coolant, preventing chip re-cutting, saving tool edge integrity, and eliminating workpiece scoring.\u003c\/p\u003e\n\u003cdiv style=\"border: 2px solid #47479F; border-radius: 6px; padding: 20px; margin: 25px 0; background-color: #fbfbfe; page-break-inside: avoid;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #47479f; font-size: 16px; border-bottom: 1px solid #e0e0e0; padding-bottom: 8px;\"\u003eModel Nomenclature Decoder: S20R-SCLCL12\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 Steel Body Core\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\u003e20\u003c\/strong\u003e - 20mm Standard Shank Diameter (Metric Configuration)\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 - 200mm Tool Overall Length Specification\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\u003eS\u003c\/strong\u003e - Screw Clamping Retention Mechanism\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\u003eC\u003c\/strong\u003e - 80° Rhombic Geometric Insert Shape Pocket\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\u003eL\u003c\/strong\u003e - 95° Approach Clearance Lead Angle\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\u003eC\u003c\/strong\u003e - 7° Insert Normal Relief Angle\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\u003eL\u003c\/strong\u003e - Left Hand Cutting Rotation Tool Direction\u003c\/div\u003e\n\u003cdiv style=\"display: block; border: 1px solid #47479F; padding: 8px; border-radius: 4px; background: #47479F; color: #ffffff;\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e - 12mm Cutting Insert Inscribed Edge Configuration (Fits CCMT1204)\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; page-break-inside: avoid;\"\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 16px;\"\u003eRunning Conventional Clockwise Spindle Passes or Front Turret Boring Setup?\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=CCMT1204\" target=\"_blank\" rel=\"noopener\"\u003eSwitch to the Mirror S20R-SCLCR12 (Right Hand) Tool Holder → \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; page-break-after: avoid;\"\u003e2. Product Core Advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtreme Stiffness-to-Size Ratio:\u003c\/strong\u003e Heat-treated structural alloy steel (HRC 43-45) allows heavy roughing passes in tight internal cavities without harmonic chattering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e95-Degree Lead Angle Geometry:\u003c\/strong\u003e Designed to facilitate clean internal contouring, face-squaring steps, and deep horizontal profiling with minimal radial cutting force.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized Pocket Capability:\u003c\/strong\u003e Uniquely fits heavy-duty 12mm edge inserts (CCMT1204) onto a slim 20mm shank, granting small-diameter setups massive metal removal capabilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Black Oxide Finishing:\u003c\/strong\u003e Coated via professional industrial oxidation to provide high corrosion resistance and prevent chip welding during hot steel turning cycles.\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; page-break-after: avoid;\"\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 Spec Specification\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eMetric Value (S20R-SCLCL12)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eImperial Inch Equivalent Model\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;\"\u003eShank Body Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e20 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.7874 inches (Interchangeable with 3\/4\" standard blocks using reduction sleeves)\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\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e200 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e7.8740 inches (R-Type Rigid Compact Reach)\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 (D-min)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e25 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.9842 inches minimum bore entry clearance limit\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\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eCCMT 120404 \/ CCMT 120408 \/ CCGT 120404\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eCCMT 431 \/ CCMT 432 \/ CCGT 431\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;\"\u003eCarbon \/ Alloy Steels (P-Class \/ AISI 1045)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e130 - 220 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.08 - 0.25 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;\"\u003eAustenitic Stainless Steels (M-Class \/ SS304)\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;\"\u003e0.06 - 0.20 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eGrey \u0026amp; Nodular Cast Irons (K-Class \/ GG20)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e100 - 180 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.10 - 0.30 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; page-break-after: avoid;\"\u003e4. Product Application Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Internal Lathe Boring:\u003c\/strong\u003e Optimized for machining hydraulic valve blocks, small bearing rings, and custom transmission bushings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Spindle Handover Cycles:\u003c\/strong\u003e Perfect tool clearance profile during automated rear-side spindle machining procedures on Swiss-type and multi-axis lathes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Metal Removal in Small Cavities:\u003c\/strong\u003e Enables machine shops to transition from small 12mm\/16mm tool bodies to a much stiffer 20mm shank while utilizing cost-effective, heavy-duty 12mm indexable edges.\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; page-break-after: avoid;\"\u003e5. Equipment Tooling Compatibility Matrix\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 20mm Round Clamping Blocks:\u003c\/strong\u003e Direct loading interface for generic metric turret discs or integrated block stations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Lathe Compatibility Ecosystem:\u003c\/strong\u003e Fits seamlessly into high-efficiency industrial turn stations like Haas, Doosan Lynx, Mazak, Citizen, and Hardinge setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal ISO Insert Interchangeability:\u003c\/strong\u003e Pocket configuration interfaces accurately with all global standard 80-degree positive rhombic size **1204** inserts (e.g., CCMT120404, CCMT120408, CCGT120402).\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; page-break-after: avoid;\"\u003e6. BEYOND Premium Carbide Grade Selection Guide\u003c\/h2\u003e\n\u003cp\u003eEnhance your S20R-SCLCL12 operational lifespan by coupling it with the corresponding BEYOND indexable carbide cutting grade classification:\u003c\/p\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 Shock Barrier\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh-speed continuous dry roughing of hard carbon steels, tool alloys, and mold blocks. Resists high heat.\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;\"\u003eExcellent edge toughness. Best for interrupted heavy cuts, tough stainless steel (SS304\/316), and 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;\"\u003eZero Built-Up Edge (BUE). Engineered specifically for high-speed boring of aluminum blanks, brass components, and plastics.\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; page-break-after: avoid;\"\u003e7. Why Choose BEYOND CNC Machine Tools?\u003c\/h2\u003e\n\u003cp\u003eBEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by production facilities worldwide. By utilizing 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; page-break-inside: avoid;\"\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;\"\u003eMarcus V. — United States\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Incredible rigidity for a 20mm shank. We run it on our Haas lathe inside tight 26mm starter bores with CCMT120404 inserts. It absolutely eats material without any chatter.\"\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; page-break-inside: avoid;\"\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 K. — Germany\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Perfect configuration for our sub-spindle back-boring passes. To fit a massive 12mm insert edge into a 20mm bar clearance is fantastic engineering. Pocket tolerance is dead-on.\"\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; page-break-inside: avoid;\"\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;\"\u003eKenji T. — Japan\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Paired with CCGT120404 polished aluminum inserts for precision compact alloy shells. Exceptional finish and clean chip splitting.\"\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; page-break-inside: avoid;\"\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;\"\u003eMatteo L. — Italy\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Very aggressive cutting capability in restricted spaces. The screw clamping force keeps the heavy insert stable even through rough structural steel profiling.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; page-break-inside: avoid;\"\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;\"\u003eRobert S. — United Kingdom\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Excellent quality. Saved us from buying expensive specialized heavy micro-bars by using our standard stock of CCMT 431 inserts.\"\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; page-break-after: avoid;\"\u003e8. AI-Style Engineering Support Engine (FAQ)\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 15px; padding: 12px; background-color: #f9f9f9; border-radius: 4px; page-break-inside: avoid;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f;\"\u003eQ1: What is the absolute minimum bore entry limit for this 20mm shank boring bar?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA1: The absolute minimum machining diameter (D-min) is 25mm (approx 0.984\"). Attempting to feed this tool holder into an internal bore smaller than 25mm will cause the head structure or insert edge clearance angle to rub heavily or violently crash.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px; padding: 12px; background-color: #f9f9f9; border-radius: 4px; page-break-inside: avoid;\"\u003e\n\u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #47479f;\"\u003eQ2: Why choose S20R-SCLCL12 over a standard S20R-SCLCL09 bar?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA2: A standard 20mm bar uses smaller size 09 inserts (CCMT09T3). This specialized '12' variant holds much larger, thicker 12mm inserts (CCMT1204), allowing you to execute significantly deeper roughing passes and handle heavier chip loads on a 20mm shank setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px; padding: 12px; background-color: #f9f9f9; border-radius: 4px; page-break-inside: avoid;\"\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eQ3: Can I run this metric tool holder directly in a 3\/4-inch standard imperial turret sleeve?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA3: A metric 20mm shank measures approximately 0.7874 inches. Since it is slightly larger than a standard 0.750\" (3\/4\") imperial pocket, it will not fit directly. You must load it into a 1-inch turret station block paired with a 1\" to 20mm metric round reduction sleeve adapter.\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; page-break-after: avoid;\"\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; page-break-inside: avoid;\"\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 with universal ISO metric standard \u003cstrong\u003eS20R-SCLCL12\u003c\/strong\u003e configurations across global tooling channels. In standard North American production shops, it corresponds to a 20mm metric round layout, adapting cleanly to 1-inch turret blocks via round metric conversion reduction sleeve systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f0f2f5; padding: 15px; border-radius: 4px; margin-bottom: 12px; page-break-inside: avoid;\"\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\u003eVibration \/ Chatter Marks:\u003c\/strong\u003e Ensure the tool overhang ratio does not exceed 3x diameter (60mm maximum extension). If harmonics persist, slightly elevate your feed rate (fn) to engage the chipbreaker or decrease nose radius to 0.4mm (CCMT120404).\u003cbr\u003e\u003cstrong\u003ePocket Wear \/ Lifetime Drop:\u003c\/strong\u003e Always clean out fine metal micro-dust from the pocket seat utilizing compressed air before indexing to avoid micro-misalignment issues.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f0f2f5; padding: 15px; border-radius: 4px; page-break-inside: avoid;\"\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;\"\u003eUniversally compatible with standard industrial metal alloy groups: \u003cstrong\u003eP\u003c\/strong\u003e (Carbon, Structural \u0026amp; Pre-hardened Steel Alloys), \u003cstrong\u003eM\u003c\/strong\u003e (Austenitic \u0026amp; Martensitic Stainless), \u003cstrong\u003eK\u003c\/strong\u003e (Grey, Nodular \u0026amp; Ductile Cast Irons), \u003cstrong\u003eN\u003c\/strong\u003e (Aluminum, Brass \u0026amp; Non-ferrous alloys), and \u003cstrong\u003eS\u003c\/strong\u003e (Inconel, Titanium \u0026amp; Superalloys).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43612156493996,"sku":"S20R-SCLCL12","price":22.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_S20R-SCLCL12_20mm_indexable_CNC_internal_boring_bar_alloy_steel_lathe_turning_tool_holder_left_hand_for_CCMT_1204_inserts.jpg?v=1781072662","url":"https:\/\/cnchome-beyond.com\/products\/beyond-s20r-sclcl12-cnc-boring-bar-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}