{"product_id":"sandvik-coromant-7861118-turning-insert-ccmt21-52-um-4425","title":"Sandvik Coromant 7861118 Turning Insert CCMT21.52-UM 4425","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7861118 is a CCMT-style turning insert designed for external and internal turning operations on CNC lathes and turning centers. It carries the grade designation 4425 and features a CVD-applied multilayer coating of Al2O3, TiCN, and TiN over a solid carbide substrate. The insert geometry is neutral-hand with an 80-degree diamond shape, a 0.25-inch inscribed circle, a 0.0313-inch corner radius, and a 7-degree relief angle. The UM chip breaker geometry targets medium-range steel cutting conditions. This insert is installed by machinists and CNC operators in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis insert is suited for turning steel and cast iron workpieces under the ISO P and K material classifications. The UM chip breaker is optimized for medium cutting depths and feeds on steel, making it a practical choice for general-purpose turning passes on both roughing and semi-finishing operations. The CoroTurn 107 series is designed for positive-rake toolholders that use either clamp or screw holding methods. Two cutting edges are available per insert, extending usable tool life before replacement.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD multilayer coating (Al2O3, TiCN, TiN) in grade 4425 for wear resistance on steel and cast iron\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape with 7-degree relief angle (clearance code C)\u003c\/li\u003e\n\u003cli\u003e0.0313-inch corner radius for a balance of edge strength and surface finish\u003c\/li\u003e\n\u003cli\u003eUM chip breaker geometry suited for medium-feed steel turning\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation compatible with standard positive-rake CoroTurn 107 toolholders\u003c\/li\u003e\n\u003cli\u003eTwo usable cutting edges per insert\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CoroTurn 107 series positive-rake toolholders that accept CCMT 06 02 08 inserts with clamp or screw holding. ISO code CCMT 06 02 08-UM 4425. Industry standard number CCMT 06 02 08-UM 4425. Compatible with ISO P (steel) and ISO K (cast iron) workpiece materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert replacement and seating should be performed with the machine powered down and the spindle fully stopped. Verify the insert pocket is clean and free of debris before seating the new insert, as contamination under the insert can cause premature edge failure. Use the appropriate torx or hex key at the recommended seating force for the CoroTurn 107 clamping system. Follow the toolholder manufacturer guidelines for insert indexing sequence and clamping torque specifications.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CCMT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (80 degrees)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4425\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Al2O3, TiCN, TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.25 inches (0.1102 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0313 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.0938 inches (3\/32 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1102 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: UM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (ISO P)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Cast Iron (ISO K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CCMT 06 02 08-UM 4425\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.74 inches L x 1.58 inches W x 0.54 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\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: 7861118\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51728211673394,"sku":"7861118","price":191.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9b82abae9d3ec64cf9044fb5e905a1c4_d6924140-301c-491d-b4e3-41fa94bc5515.jpg?v=1788689620","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7861118-turning-insert-ccmt21-52-um-4425","provider":"Voomi Supply","version":"1.0","type":"link"}