{"product_id":"sandvik-coromant-8021118-cnmg-12-04-12-mr-4415-turning-insert","title":"Sandvik Coromant 8021118 Cnmg 12 04 12-MR 4415 Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 8021118 is a CNMG-style indexable turning insert designed for metal cutting operations on CNC lathes and turning centers. It carries the ISO designation CNMG 12 04 12-MR 4415 and is manufactured from cemented carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN. This coating stack delivers wear resistance and thermal protection suited to continuous and interrupted steel cutting at moderate to high cutting speeds. The insert features a 0.5000 inch inscribed circle, a 0.0469 inch corner radius, and a neutral hand orientation. The MR chip breaker geometry is intended for medium roughing applications. Licensed machinists and CNC operators install this insert as part of routine tooling changeovers.\u003c\/p\u003e\u003cp\u003eThis insert is used in external turning, facing, and profiling of steel and similar ISO P workpiece materials. The neutral hand configuration allows use in both right-hand and left-hand tool holders that accept CNMG inserts. The CNMG-MR series is a common choice in production turning environments where consistent chip control and edge life are priorities. It is held in the tool holder by clamp or screw method, consistent with standard CNMG toolholder designs. Typical applications include roughing and semi-finishing passes on carbon steel and alloy steel components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD multilayer coating: TiCN base, Al2O3 mid-layer, TiN top layer for wear and thermal resistance\u003c\/li\u003e\n\u003cli\u003eGrade 4415 carbide substrate optimized for ISO P (steel) cutting conditions\u003c\/li\u003e\n\u003cli\u003eMR chip breaker geometry for controlled chip formation in medium roughing\u003c\/li\u003e\n\u003cli\u003e0.0469 inch corner radius for balance between edge strength and surface finish\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation compatible with standard CNMG right-hand and left-hand holders\u003c\/li\u003e\n\u003cli\u003eClamp and screw holding method for secure seating in standard CNMG toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement insert for standard CNMG toolholders accepting CNMG 12 04 12 inserts with clamp or screw retention. Suited for ISO P (steel) secondary workpiece material applications per ISO code classification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed and replaced by machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench and clamp hardware specified by the toolholder manufacturer when securing the insert. Handle carbide inserts with care to avoid chipping edges prior to use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMG 12 04 12-MR 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CNMG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape Code\u003c\/strong\u003e: C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCN, Al2O3, TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: MR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0469 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle (Clearance Code N)\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolding Method\u003c\/strong\u003e: Clamp, Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CNMG-MR (ISO P)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material Code\u003c\/strong\u003e: K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.54 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 3.74 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 0.44 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.23 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SANDVIK COROMANT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 8021118\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51730805162290,"sku":"8021118","price":285.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1ca2d523295033b7f6d267336371ad3e.jpg?v=1788723145","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-8021118-cnmg-12-04-12-mr-4415-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}