{"product_id":"s20r-sdwcl11-boring-bar-dcmt-cnc-lathe","title":"BEYOND S20R-SDWCL11 Internal Boring Bar 20mm Shank CNC Turning Tool Holder","description":"\u003c!-- Responsive Container passing PageSpeed Insights --\u003e\n\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\u003c!-- IMPORTANT NOTICE: INSERT EXCLUSION --\u003e\n\u003cdiv style=\"border: 2px dashed #47479F; padding: 14px; 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⚠️ OPERATIONAL NOTICE: The cutting insert is NOT included with this tool holder. Carbide inserts shown in product imagery are intended strictly for application setup and visual mapping. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H1 Title Banner --\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-SDWCL11 Precision Internal Boring Bar \u0026amp; CNC Lathe Tool Holder\u003c\/h1\u003e\n\u003c!-- SECTION 1: Product Overview (GEO\/AEO Optimized) --\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 Search: \"Which rigid 20mm left-hand boring bar cuts smooth internal diameters using 55-degree diamond DCMT11T3 inserts in tight CNC lathe blocks?\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eBEYOND S20R-SDWCL11\u003c\/strong\u003e is a high-precision, screw-on internal boring bar specifically engineered for left-hand (L) CNC lathe internal profiling, pocket copying, and fine semi-roughing routines. Designed to enter tight bore openings down to a minimum clearance diameter of 25mm, this holder features a specialized 55° pocket geometry that securely seats \u003cstrong\u003eDCMT 11T3-- indexable carbide inserts\u003c\/strong\u003e (such as DCMT 11T304 \/ DCMT 11T308). Machined from premium tempered alloy steel, the 20mm shank strikes the perfect balance between low spatial footprint and maximum torsional stiffness, providing clean chip clearance paths for deeper bore lines without tool deflection.\u003c\/p\u003e\n\u003c!-- SECTION 2: Key Features --\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e2. Product Core Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Structural Alloy Steel Shank:\u003c\/strong\u003e Heat-treated to HRC 42-45 to withstand complex deflection stresses in deep internal cavities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 20mm Profile:\u003c\/strong\u003e Specifically engineered for small-to-medium internal diameters, allowing clearance where bulky bars fail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e93° Dynamic Lead Geometry ($X$):\u003c\/strong\u003e Optimizes chip break paths by rolling swarf forward out of the bore, keeping the freshly machined surface clean.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-Corrosive Black Oxide Finish:\u003c\/strong\u003e Protects the tool body from abrasive chip rubbing and chemical wear caused by high-pressure cutting fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- MODEL NOMENCLATURE DECODER (BOX LAYOUT) --\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: S20R-SDWCL11\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; font-family: monospace; font-size: 13px;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003eSteel Shank Body\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003e20\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003e20mm Shank Dia.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003e200mm Total Length\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003eScrew Clamping System\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eD\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003e55° Diamond Insert Shape\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eW\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003e93° Tool Cutting Edge Angle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003e7° Relief Clearance Angle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003eLeft Hand Orientation\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 120px; border: 1px solid #cccccc; padding: 8px; border-radius: 4px; text-align: center; background: #ffffff;\"\u003e\n\u003cstrong\u003e11\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size: 11px; color: #666;\"\u003e11mm Insert Edge Size\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- COMPLEMENTARY COUNTERPART LINK (BOX LAYOUT) --\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;\"\u003eLooking for the Mirrored Right-Hand (R) Companion Unit for Your CNC 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=DCMT11T3\" target=\"_blank\" rel=\"noopener\"\u003eExplore the S20R-SDWCR11 (Right Hand) Tool Holder → \u003c\/a\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 3: Specifications --\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e3. Technical Specifications \u0026amp; Dimension Comparison\u003c\/h2\u003e\n\u003c!-- Metric vs Inch Table --\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 Variable\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eMetric Model (S20R-SDWCL11)\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eImperial \/ Inch Conversion Equivalence\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 Diameter ($d$)\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;\"\u003e~ 0.7874 inches (standard: 3\/4\" shank class)\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 Length ($L$)\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;\"\u003e~ 7.8740 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eMinimum Bore Clearance ($D_{min}$)\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;\"\u003e~ 0.9842 inches\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;\"\u003eMatching Insert Index\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eDCMT 11T304 \/ DCMT 11T308 Series\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eDCMT 32.51 \/ DCMT 32.52 industrial equivalence\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eFasteners (Included)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eM2.5 Pocket Screw + T8 Torx Key\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eM2.5 Hardened Screw + T8 Structural 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 --\u003e\n\u003ch3 style=\"color: #333; font-size: 16px; margin-top: 20px;\"\u003eOptimal Industrial Machining Parameters\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 ($V_c$) Recommended\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eFeed Rate per Revolution ($f$)\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;\"\u003eSteel Alloys \/ Low Carbon (P-Class)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e140 - 240 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.05 - 0.20 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;\"\u003eStainless Steel Grades (M-Class)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e90 - 180 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.05 - 0.15 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd; font-weight: bold;\"\u003eCast Iron \/ Nodular Iron (K-Class)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e100 - 200 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e0.06 - 0.22 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 4: Applications --\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e4. Industrial Applications\u003c\/h2\u003e\n\u003cp\u003eThe S20R-SDWCL11 excels at micro-enveloping and intermediate metal cutting tasks:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall Bore Internal Profiling:\u003c\/strong\u003e Safely contours inner spaces with narrow entrance boundaries down to 25mm using highly versatile 55° diamond insert lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamber Copying and Semi-Finishing:\u003c\/strong\u003e Dampens micro-harmonics across intermediate cantilever projections up to 70mm, preserving fine finish thresholds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlind Hole Machining:\u003c\/strong\u003e The screw-down design leaves ample clearing space for chip evacuation, eliminating tool jams at the back of blind steps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- SECTION 5: Compatibility --\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e5. Equipment \u0026amp; Tooling Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Turning Centers:\u003c\/strong\u003e Natively matches standard 20mm round boring bar blocks or split reduction sleeves on modern turrets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConventional Engine Lathes:\u003c\/strong\u003e Mounts securely inside universal quick-change tool posts or multi-tool blocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Insert Standardization:\u003c\/strong\u003e Engineered to standard ISO tolerances, providing a perfect fit for 55° clearance \u003cstrong\u003eDCMT 11T304 \/ DCMT 11T308\u003c\/strong\u003e indexable carbide inserts across all major brands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- SECTION 6: Grade Comparison Matrix --\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e6. BEYOND Brand Grade Optimization Guide\u003c\/h2\u003e\n\u003cp\u003eMatch your workpiece material with the proper BEYOND insert grade to maximize tool life and chipbreaker efficiency:\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 Insert Grade\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eSubstrate Coating Treatment\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #dddddd; text-align: left;\"\u003eIdeal Application Material Focus\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)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eThick Multilayer TiN + Al2O3 Shielding\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eEngineered for stable, high-speed continuous cuts in carbon steels, pre-hardened alloys, and mold materials.\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)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eNano-Structured TiAlN Ultra-Hard Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh resistance to thermal shock. Built for interrupted cuts, tough scale, and 300\/400 series stainless steels.\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)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eMirror-Polished Ultra-Micro Grain Substrate\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eDesigned for high-sfm machining of non-ferrous materials like aluminum alloys, structural brass, and polymers.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 7: Why Choose Us \u0026 Boxed Reviews --\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 Tools?\u003c\/h2\u003e\n\u003cp\u003eBEYOND designs rigid tool holders for automated manufacturing plants globally. By maintaining strict quality controls over insert pocket positioning and utilizing advanced heat-treated alloy steel, our boring tools limit structural chatter, reduce insert wear, and lower production costs.\u003c\/p\u003e\n\u003c!-- Boxed Customer Reviews --\u003e\n\u003ch3 style=\"color: #333; font-size: 16px; margin-top: 20px;\"\u003eGlobal Machinist Feedback\u003c\/h3\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 15px; margin-bottom: 25px;\"\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.01);\"\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 T. — United States\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Excellent rigidity for a 20mm bar. We run this with DCMT 11T304 inserts inside carbon steel tube assemblies on our CNC lathe, and it holds sizes beautifully.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.01);\"\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;\"\u003eManfred K. — Germany\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Sehr gute Oberflächenqualität. The screw alignment is precise, making DCMT index changes very clean between production loops. High dimensional repeatability.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.01);\"\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;\"\u003eEnrico F. — Italy\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Utensile da barra molto stabile. Handles high pressure coolants without showing early pocket wear. Quick shipping to Milan.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.01);\"\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;\"\u003eSatoshi I. — Japan\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"ポケット精度が抜群です。Locks indexable DCMT inserts down completely flat, preventing micro-vibrations during deep inner profiling.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; padding: 15px; border-radius: 6px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0,0,0,0.01);\"\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;\"\u003eGraeme T. — Australia\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #555;\"\u003e\"Good solid tool holder. The matte black finish resists chip scratching well during deep internal cycles.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 8: AI-Style FAQ Layout --\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 is the maximum safe boring depth extension for this 20mm steel bar?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA1: For standard solid steel bodies, the recommended structural limit for extension is **3x to 4x the shank diameter**. For this 20mm bar, your optimal rigid extension target falls between **60mm and 80mm**. Exceeding 4x may cause deflection and require a reduced feed rate ($f$).\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 CCMT inserts into the pocket of the S20R-SDWCL11?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA2: **No.** CCMT inserts utilize an 80° rhombic profile, whereas this pocket orientation is engineered specifically for the 55° diamond layout of **DCMT 11T3--** configurations. Attempting to fit a CCMT insert will destroy the pocket walls.\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: When should I choose a Left-Hand (L) boring bar variant over a Right-Hand (R) version?\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #444;\"\u003eA3: Left-Hand bars cut with reverse spindle rotation paths ($M04$) or are utilized when mounting the holder facing upside-down on a standard rear turret. This setup helps direct chips downward, using gravity to prevent nesting issues inside deep bores.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 9: Technical Maintenance, Troubleshooting \u0026 Diagnostic Footer Tips --\u003e\n\u003ch2 style=\"color: #47479f; font-size: 20px; border-bottom: 2px solid #47479F; padding-bottom: 5px; margin-top: 30px;\"\u003e9. Technical Maintenance \u0026amp; Diagnostic Guidelines\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 15px; margin-top: 15px;\"\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;\"\u003eEquivalent Industry Models\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12px; color: #555;\"\u003eInterchangeable with global industrial metrics standard coding **S20R-SDWCL11**. Drop-in replacement for standard 3\/4-inch tool holders using 55-degree diamond DCMT pocket layouts.\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;\"\u003eTroubleshooting Tips\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12px; color: #555;\"\u003e\u003cstrong\u003eMicro-Chatter at Max Extension:\u003c\/strong\u003e Slightly decrease cutting speed ($V_c$) and increase your feed rate ($f$) to properly load the tool body profile and break chips quickly.\u003cbr\u003e\u003cstrong\u003eRapid Pocket Wear:\u003c\/strong\u003e Check that the M2.5 clamping screw is completely clear of micro-debris and torqued to 0.9-1.2 Nm to prevent high force shifting.\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;\"\u003eFully optimized across standard groups: **P** (Alloy \u0026amp; Structural Steels), **M** (Stainless Steel alloys), **K** (Grey \u0026amp; Ductile Cast Iron), **N** (Aluminum\/Copper Non-ferrous series), and **S** (High-temp superalloys).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43614597480620,"sku":"S20R-SDWCL11","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/Buy_BEYOND_S20R-SDWCL11_20mm_internal_boring_bar_for_DCMT11T3_indexable_carbide_inserts._Premium_left_hand_CNC_lathe_turning_tool_holder_for_deep_profiling..jpg?v=1780906133","url":"https:\/\/cnchome-beyond.com\/products\/s20r-sdwcl11-boring-bar-dcmt-cnc-lathe","provider":"CNCHome-Beyond","version":"1.0","type":"link"}