{"product_id":"beyond-mcbnl2020k12-left-hand-turning-tool-holder","title":"BEYOND MCBNL2020K12 Left-Hand External Turning Tool Holder - M-Type","description":"\u003cdiv style=\"font-family: 'Segoe UI', Roboto, Arial, sans-serif; color: #333; line-height: 1.6; max-width: 1100px; margin: auto; border: 1px solid #e0e0e0; background-color: #ffffff;\"\u003e\n\u003cdiv style=\"background-color: #47479f; padding: 45px 20px; text-align: center;\"\u003e\n\u003ch1 style=\"color: #ffffff; margin: 0; font-size: 30px; font-weight: 800; letter-spacing: 1px;\"\u003eMCBNL2020K12\u003c\/h1\u003e\n\u003cp style=\"color: #ffffff; font-size: 16px; margin-top: 10px; text-transform: uppercase; letter-spacing: 2px;\"\u003eProfessional Left-Hand M-Type External Turning Tool Holder\u003c\/p\u003e\n\u003cp style=\"color: #ffffff; font-size: 14px; opacity: 0.9;\"\u003eBrand: BEYOND | Origin: China | High-Rigidity Industrial Grade\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px 25px; background-color: #f8f9fa; border-bottom: 4px solid #47479F; text-align: center;\"\u003e\n\u003cp style=\"margin: 0; font-weight: bold; color: #d9534f; font-size: 15px;\"\u003e⚠️ NOTICE: The tool holder includes all spare parts. \u003cspan style=\"color: #47479f;\"\u003eInserts (Blades) are NOT included.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 40px 20px;\"\u003e\n\u003ch3 style=\"color: #47479f; border-left: 5px solid #47479F; padding-left: 15px; margin-bottom: 30px; font-size: 22px;\"\u003eModel Identification Guide\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-start;\"\u003e\n\u003cdiv style=\"border: 2px solid #47479F; background: #47479F; color: white; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003eM\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eClamping: Multi-lock\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003eC\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eShape: 80° Diamond\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003eB\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eApproach: 75°\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003eN\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eClearance: 0°\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003eL\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eHand: Left Hand\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003e2020\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003e20x20mm Shank\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003eK\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eLength: 125mm\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #47479F; color: #47479f; padding: 12px; min-width: 105px; text-align: center; border-radius: 4px;\"\u003e\n\u003cstrong\u003e12\u003c\/strong\u003e\u003cbr\u003e\u003csmall style=\"font-size: 10px;\"\u003eInsert: CNMG1204\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 0 20px 40px 20px;\"\u003e\n\u003ch3 style=\"color: #47479f; border-bottom: 2px solid #47479F; padding-bottom: 10px; font-size: 22px;\"\u003eTechnical Specification \u0026amp; Spare Parts List\u003c\/h3\u003e\n\u003cp style=\"font-size: 13px; color: #666; margin-bottom: 15px;\"\u003eDetailed specifications for the MCBNR \/ MCBNL Series (All Sizes):\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; min-width: 950px; text-align: center;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #47479f; color: white;\"\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd;\"\u003eModel Type (R\/L)\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd;\"\u003eCompatible Insert\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd;\"\u003eShank(hxb)\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd; background-color: #3b3b85;\"\u003eShim\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd; background-color: #3b3b85;\"\u003ePin\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd; background-color: #3b3b85;\"\u003eClamp\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd; background-color: #3b3b85;\"\u003eScrew\u003c\/th\u003e\n\u003cth style=\"padding: 15px; border: 1px solid #ddd; background-color: #3b3b85;\"\u003eWrench\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2fb; font-weight: bold;\"\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003eMCBNR\/L 2020K12\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\" rowspan=\"2\"\u003eCNMG 1204xx\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003e20 x 20\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\" rowspan=\"2\"\u003eMC1204\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\" rowspan=\"2\"\u003eCTM617\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\" rowspan=\"2\"\u003eHL1813\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\" rowspan=\"2\"\u003eML0625\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\" rowspan=\"2\"\u003eL3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2fb;\"\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003eMCBNR\/L 1616H12\u003cbr\u003e2525M12 \/ 3232P12\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003e16x16 \/ 25x25 \/ 32x32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003eMCBNR\/L 2525M16 \/ 3232P16\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003e\u003cb\u003eCNMG 1606xx\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003e25x25 \/ 32x32\u003c\/td\u003e\n\u003ctd\u003eMC1604\u003c\/td\u003e\n\u003ctd\u003eCTM822\u003c\/td\u003e\n\u003ctd\u003eHL2217\u003c\/td\u003e\n\u003ctd\u003eML0830\u003c\/td\u003e\n\u003ctd\u003eL3.0\/L4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2fb;\"\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003eMCBNR\/L 3232P19\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003e\u003cb\u003eCNMG 1906xx\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 15px; border: 1px solid #ddd;\"\u003e32 x 32\u003c\/td\u003e\n\u003ctd\u003eMC1904\u003c\/td\u003e\n\u003ctd\u003eCTM1025\u003c\/td\u003e\n\u003ctd\u003eHL2724\u003c\/td\u003e\n\u003ctd\u003eML1035\u003c\/td\u003e\n\u003ctd\u003eL5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #47479f; color: white; padding: 35px; margin: 0 20px; border-radius: 4px;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #ffffff; text-transform: uppercase; border-bottom: 1px solid rgba(255,255,255,0.3); padding-bottom: 10px;\"\u003eCutting Data Recommendations\u003c\/h3\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 20px;\"\u003e\n\u003cdiv style=\"border-left: 4px solid #ffffff; padding-left: 20px;\"\u003e\n\u003cp style=\"margin: 0; font-weight: bold; font-size: 17px;\"\u003eCarbon \u0026amp; Alloy Steel (P)\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0 0; font-size: 14px;\"\u003eCutting Speed (Vc): 160 - 280 m\/min\u003c\/p\u003e\n\u003cp style=\"margin: 3px 0 0 0; font-size: 14px;\"\u003eFeed Rate (fz): 0.15 - 0.50 mm\/r\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #ffffff; padding-left: 20px;\"\u003e\n\u003cp style=\"margin: 0; font-weight: bold; font-size: 17px;\"\u003eStainless Steel (M)\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0 0; font-size: 14px;\"\u003eCutting Speed (Vc): 120 - 210 m\/min\u003c\/p\u003e\n\u003cp style=\"margin: 3px 0 0 0; font-size: 14px;\"\u003eFeed Rate (fz): 0.12 - 0.35 mm\/r\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; margin-top: 30px;\"\u003e\u003ca style=\"display: inline-block; background: #ffffff; color: #47479f; padding: 12px 35px; text-decoration: none; font-weight: 800; border-radius: 2px;\" href=\"https:\/\/cnchome-beyond.com\/search?type=product\u0026amp;options%5Bunavailable_products%5D=last\u0026amp;options%5Bprefix%5D=last\u0026amp;q=CNMG1204\" target=\"_blank\" rel=\"noopener\"\u003eSHOP COMPATIBLE CNMG INSERTS →\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 40px 20px;\"\u003e\n\u003ch3 style=\"color: #47479f; font-size: 20px;\"\u003eUnit Reference \u0026amp; Shank Size Conversion\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; text-align: left;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eMetric:\u003c\/b\u003e 2020K12 (20mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eImperial Equivalent:\u003c\/b\u003e 12-4C (3\/4\")\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eMetric:\u003c\/b\u003e 1616H12 (16mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eImperial Equivalent:\u003c\/b\u003e 10-4B (5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eMetric:\u003c\/b\u003e 2525M12 (25mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eImperial Equivalent:\u003c\/b\u003e 16-4D (1\")\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eMetric:\u003c\/b\u003e 3232P19 (32mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cb\u003eImperial Equivalent:\u003c\/b\u003e 20-4E (1-1\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px 20px; background-color: #fdfdfd; border-top: 1px solid #eee;\"\u003e\n\u003ch3 style=\"color: #47479f; margin-bottom: 20px;\"\u003eGlobal Verified Feedback\u003c\/h3\u003e\n\u003cdiv style=\"font-size: 14px; color: #555;\"\u003e\n\u003cp style=\"border-bottom: 1px solid #f2f2f2; padding-bottom: 10px;\"\u003e⭐⭐⭐⭐⭐ \"The \u003cb\u003eMCBNL2020K12\u003c\/b\u003e is extremely robust. Perfect for my left-hand turning operations. The 20mm shank is very stable.\" - \u003ci\u003eMarkus, Germany\u003c\/i\u003e\u003c\/p\u003e\n\u003cp style=\"border-bottom: 1px solid #f2f2f2; padding-bottom: 10px;\"\u003e⭐⭐⭐⭐⭐ \"Fast shipping to UK. The M-type clamping is superior for heavy roughing. BEYOND quality is excellent.\" - \u003ci\u003eRobert, UK\u003c\/i\u003e\u003c\/p\u003e\n\u003cp style=\"border-bottom: 1px solid #f2f2f2; padding-bottom: 10px;\"\u003e⭐⭐⭐⭐ \"Good tool life and the accessories (shim, clamp) are high precision. Fits my CNMG inserts perfectly.\" - \u003ci\u003eJason, Canada\u003c\/i\u003e\u003c\/p\u003e\n\u003cp style=\"border-bottom: 1px solid #f2f2f2; padding-bottom: 10px;\"\u003e⭐⭐⭐⭐⭐ \"Zero vibration at recommended feeds. Great value compared to big brands.\" - \u003ci\u003eLiam, Australia\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e⭐⭐⭐⭐⭐ \"The finish I get with this tool holder is impressive. Highly recommend the 20x20mm series.\" - \u003ci\u003eS. Watanabe, Japan\u003c\/i\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 30px 20px; border-top: 1px solid #eee;\"\u003e\n\u003ch3 style=\"color: #47479f;\"\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003e\n\u003cp\u003e\u003cb\u003eQ: What is the difference between MCBNR and MCBNL?\u003c\/b\u003e\u003cbr\u003eA: MCBNR is a Right-hand tool holder, while MCBNL is the Left-hand version. Both use the same 80° CNMG inserts.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Is this holder suitable for internal boring?\u003c\/b\u003e\u003cbr\u003eA: No, this is an external turning tool holder. For internal work, please see our boring bar category.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Does the holder come with a wrench?\u003c\/b\u003e\u003cbr\u003eA: Yes, all BEYOND tool holders include the appropriate wrenches and spare parts as listed in the technical table.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f8f8f8; padding: 25px; margin: 20px; border-radius: 4px; border: 1px solid #ddd;\"\u003e\n\u003ch4 style=\"color: #47479f; margin-top: 0;\"\u003eIndustrial Clamping Guide:\u003c\/h4\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 15px; font-size: 12px;\"\u003e\n\u003cdiv style=\"padding: 10px; background: white; border: 1px solid #eee;\"\u003e\n\u003cb\u003eM-TYPE:\u003c\/b\u003e Multi-Lock (Clamp + Pin). Maximum rigidity for heavy roughing.\u003c\/div\u003e\n\u003cdiv style=\"padding: 10px; background: white; border: 1px solid #eee;\"\u003e\n\u003cb\u003eW-TYPE:\u003c\/b\u003e Lever Clamping. Fast insert changes in general turning operations.\u003c\/div\u003e\n\u003cdiv style=\"padding: 10px; background: white; border: 1px solid #eee;\"\u003e\n\u003cb\u003eP-TYPE:\u003c\/b\u003e Hole Clamping. Best chip clearance for high-speed finishing.\u003c\/div\u003e\n\u003cdiv style=\"padding: 10px; background: white; border: 1px solid #eee;\"\u003e\n\u003cb\u003eS-TYPE:\u003c\/b\u003e Screw Clamping. Minimal interference, best for small tool diameters.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #47479f; color: white; padding: 35px; text-align: center; font-size: 11px;\"\u003e\n\u003cp style=\"margin-bottom: 12px; font-weight: bold;\"\u003eLong-tail Search Keywords: MCBNL2020K12, CNC External Turning Tool, Left Hand Lathe Holder, CNMG12 Indexable Bar, BEYOND Tools China, 20mm Turning Shank.\u003c\/p\u003e\n\u003cp\u003e© BEYOND Cutting Tools - Professional Industrial Machining Solutions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"OYYU Champions League","offers":[{"title":"Default Title","offer_id":43384795529388,"sku":"MCBNL2020K12","price":22.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/BEYOND_MCBNL2020K12_Left-Hand_External_Turning_Tool_Holder_technical_drawing_and_spare_parts_specifications.jpg?v=1773141065","url":"https:\/\/cnchome-beyond.com\/products\/beyond-mcbnl2020k12-left-hand-turning-tool-holder","provider":"CNCHome-Beyond","version":"1.0","type":"link"}