{"product_id":"srgcl2020k12-external-turning-tool-holder-rcmt-beyond","title":"SRGCL2020K12 External Turning Tool Holder for RCMT Inserts – BEYOND","description":"\u003cdiv style=\"font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333; line-height: 1.6; max-width: 1000px; margin: auto; background-color: #fff;\"\u003e\n\u003cdiv style=\"background-color: #47479f; padding: 35px 20px; text-align: center; border-radius: 4px;\"\u003e\n\u003ch1 style=\"color: #ffffff; margin: 0; font-size: 26px; text-transform: uppercase;\"\u003eSRGCL2020K12 External Turning Toolholder\u003c\/h1\u003e\n\u003cp style=\"color: #d1d1f0; margin: 10px 0 0 0; font-size: 16px;\"\u003ePrecision 20x20mm Left-Hand Shank for RCMT1204 Round Inserts\u003c\/p\u003e\n\u003c\/div\u003e\n\u003csection style=\"padding: 25px 15px;\"\u003e\n\u003ch2 style=\"color: #47479f; border-left: 6px solid #47479F; padding-left: 15px; font-size: 22px;\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"What is the best 20mm toolholder for vibration-free profiling and radius turning with round inserts?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBeyond SRGCL2020K12\u003c\/strong\u003e is a professional-grade external turning toolholder designed for high-performance profiling using \u003cstrong\u003eRCMT1204\u003c\/strong\u003e round inserts. The 20x20mm shank provides a perfect balance of agility and rigidity for medium-sized CNC lathes. By utilizing round insert geometry, the SRGCL series offers a stronger cutting edge than traditional diamond shapes, allowing for multi-directional cutting and exceptional heat dissipation in tough-to-machine alloys.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection style=\"padding: 20px 15px; background-color: #f4f4f9; border-radius: 8px; margin: 0 15px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 22px;\"\u003eKey Features\u003c\/h2\u003e\n\u003cul style=\"list-style-type: none; padding: 0;\"\u003e\n\u003cli style=\"margin-bottom: 12px; padding-left: 30px; position: relative;\"\u003e\n\u003cspan style=\"color: #47479f; position: absolute; left: 0; font-weight: bold;\"\u003e✔\u003c\/span\u003e \u003cstrong\u003eHigh Rigidity Design:\u003c\/strong\u003e Forged from high-tensile alloy steel to suppress vibration during deep profiling.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px; padding-left: 30px; position: relative;\"\u003e\n\u003cspan style=\"color: #47479f; position: absolute; left: 0; font-weight: bold;\"\u003e✔\u003c\/span\u003e \u003cstrong\u003eScrew-Down Clamping:\u003c\/strong\u003e Ensures the RCMT12 insert remains perfectly stationary under high radial loads.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 12px; padding-left: 30px; position: relative;\"\u003e\n\u003cspan style=\"color: #47479f; position: absolute; left: 0; font-weight: bold;\"\u003e✔\u003c\/span\u003e \u003cstrong\u003eProfiling Versatility:\u003c\/strong\u003e No fixed lead angle allows for smooth radii and contouring in both directions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection style=\"padding: 30px 15px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 22px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; text-align: center;\"\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eScrew Clamp\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eRound Shape\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eG\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003e90° Approach\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003e7° Relief\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eLeft Hand\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003e2020\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003e20x20mm\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003e125mm Len\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; padding: 10px; flex: 1; min-width: 80px; border-radius: 4px;\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eRCMT12\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 25px; border: 1px solid #ddd;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: white;\"\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eTechnical Data\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eMetric (mm)\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eImperial (inch)\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 #ddd; font-weight: bold;\"\u003eShank Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e20 x 20 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e0.787\" x 0.787\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eOverall Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e125 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e4.921\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCompatible Insert\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eRCMT 1204**\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eRound 1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #47479f;\"\u003eRecommended Cutting Parameters\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eMaterial Group\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eCutting Speed (Vc)\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eFeed Rate (f)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCarbon Steel (P)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e150 - 230 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e0.15 - 0.45 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eStainless Steel (M)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e110 - 170 m\/min\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e0.10 - 0.35 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"margin-top: 25px; border: 2px dashed #47479F; padding: 20px; text-align: center; border-radius: 8px;\"\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-weight: bold; color: #47479f;\"\u003eRequired Insert: RCMT 1204** \/ RCGT 1204**\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #666;\"\u003eSpecifically designed for 12mm round inserts for maximum profiling agility.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 25px; background-color: #47479f; color: white; text-decoration: none; border-radius: 4px; font-weight: bold;\" href=\"https:\/\/cnchome-beyond.com\/search?q=RCMT12\" target=\"_blank\" rel=\"noopener\"\u003eShop RCMT1204 Inserts →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 20px; padding: 0 15px; margin-bottom: 30px;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 280px; padding: 20px; border: 1px solid #eee; border-radius: 8px;\"\u003e\n\u003ch3 style=\"color: #47479f;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"padding-left: 20px; font-size: 14px;\"\u003e\n\u003cli\u003eComplex Shaft Profiling\u003c\/li\u003e\n\u003cli\u003eRadii Turning \u0026amp; Contouring\u003c\/li\u003e\n\u003cli\u003eHeavy Roughing of Castings\u003c\/li\u003e\n\u003cli\u003eSemi-finishing in Stainless Steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 280px; padding: 20px; border: 1px solid #eee; border-radius: 8px;\"\u003e\n\u003ch3 style=\"color: #47479f;\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px;\"\u003eFits all standard CNC Turrets with 20mm tool slots. Fully compatible with ISO standard RCMT\/RCGT 12mm round inserts from brands like Sandvik, Mitsubishi, and Beyond.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection style=\"padding: 25px 15px; border-top: 1px solid #eee;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 24px;\"\u003eBeyond Material Comparison\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px;\"\u003e\u003cstrong\u003eForged Steel Shank:\u003c\/strong\u003e Our toolholders are manufactured from 42CrMo alloy steel, quenched and tempered to HRC 42-45. Compared to standard 45# carbon steel shanks found in budget alternatives, Beyond toolholders offer significantly higher impact resistance and thread durability.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection style=\"padding: 30px 15px; background-color: #f9f9f9;\"\u003e\n\u003ch2 style=\"color: #47479f; text-align: center; font-size: 24px;\"\u003eCustomer Field Reviews\u003c\/h2\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; justify-content: center; margin-top: 20px;\"\u003e\n\u003cdiv style=\"border: 1px solid #ddd; padding: 15px; border-radius: 8px; background: white; width: 300px;\"\u003e\n\u003cspan style=\"color: #f1c40f;\"\u003e★★★★★\u003c\/span\u003e\n\u003cp style=\"font-size: 14px; font-style: italic;\"\u003e\"Great stability for profiling stainless parts. The 20mm shank fits perfectly in our HAAS turret.\"\u003c\/p\u003e\n\u003csmall\u003e— John M., USA\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #ddd; padding: 15px; border-radius: 8px; background: white; width: 300px;\"\u003e\n\u003cspan style=\"color: #f1c40f;\"\u003e★★★★★\u003c\/span\u003e\n\u003cp style=\"font-size: 14px; font-style: italic;\"\u003e\"Halter ist sehr präzise gefertigt. RCMT1204 Platten passen spielfrei. Top Preis-Leistung.\"\u003c\/p\u003e\n\u003csmall\u003e— Dieter W., Germany\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #ddd; padding: 15px; border-radius: 8px; background: white; width: 300px;\"\u003e\n\u003cspan style=\"color: #f1c40f;\"\u003e★★★★★\u003c\/span\u003e\n\u003cp style=\"font-size: 14px; font-style: italic;\"\u003e\"Excellent rigidity for radii turning. Much better tool life than using diamond inserts for profiling.\"\u003c\/p\u003e\n\u003csmall\u003e— Marco P., Italy\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #ddd; padding: 15px; border-radius: 8px; background: white; width: 300px;\"\u003e\n\u003cspan style=\"color: #f1c40f;\"\u003e★★★★★\u003c\/span\u003e\n\u003cp style=\"font-size: 14px; font-style: italic;\"\u003e\"Precision manufacturing. Fits our Japanese lathe turrets perfectly.\"\u003c\/p\u003e\n\u003csmall\u003e— Kenji S., Japan\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"padding: 30px 15px;\"\u003e\n\u003ch2 style=\"color: #47479f; font-size: 24px; text-align: center;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"max-width: 850px; margin: auto;\"\u003e\n\u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 15px; cursor: pointer;\"\u003e\n\u003csummary style=\"font-weight: bold;\"\u003eCan I use RCGT inserts for aluminum in this holder?\u003c\/summary\u003e\n\u003cp style=\"padding-top: 10px;\"\u003eYes! The SRGCL2020K12 is designed for both RCMT (standard) and RCGT (ground\/polished) 12mm round inserts.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 15px; cursor: pointer;\"\u003e\n\u003csummary style=\"font-weight: bold;\"\u003eIs this toolholder Left-Hand or Right-Hand?\u003c\/summary\u003e\n\u003cp style=\"padding-top: 10px;\"\u003eThe \"L\" in SRGC\u003cstrong\u003eL\u003c\/strong\u003e indicates a \u003cstrong\u003eLeft-Hand\u003c\/strong\u003e toolholder. Ensure this matches your machine's turret and spindle rotation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 15px; cursor: pointer;\"\u003e\n\u003csummary style=\"font-weight: bold;\"\u003eWhy use a round insert for profiling?\u003c\/summary\u003e\n\u003cp style=\"padding-top: 10px;\"\u003eRound inserts have the strongest cutting edge and allow for multi-directional cutting without chipping, which is ideal for complex contours.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cdiv style=\"background-color: #47479f; color: #ffffff; padding: 30px; border-radius: 4px; margin-top: 20px;\"\u003e\n\u003ch4 style=\"margin: 0; color: #ffffff; text-transform: uppercase;\"\u003eMaterial Pro Tip: Round vs. Diamond Profiling\u003c\/h4\u003e\n\u003cp style=\"font-size: 14px; margin-top: 10px; margin-bottom: 0;\"\u003eWhile diamond inserts (CNMG\/DNMG) are great for straight turning, round inserts on an \u003cstrong\u003eSRGCL\u003c\/strong\u003e holder are superior for materials with hard skins or scales. By distributing the cutting force over a larger radius, you significantly increase tool life and process stability in interrupted cuts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BEYOND","offers":[{"title":"Default Title","offer_id":43589576949932,"sku":"SRGCL2020K12","price":22.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/SRGCL2020K12_b0e3e342-9708-4e7d-9393-7956bc998728.jpg?v=1778973452","url":"https:\/\/cnchome-beyond.com\/products\/srgcl2020k12-external-turning-tool-holder-rcmt-beyond","provider":"CNCHome-Beyond","version":"1.0","type":"link"}