{"product_id":"sandvik-coromant-7860871-turning-insert-dcmt32-51-um","title":"Sandvik Coromant 7860871 Turning Insert DCMT32.51-UM","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7860871 is a solid carbide turning insert in the DCMT style, designed for precision turning operations on CNC lathes and turning centers. It carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides thermal resistance, wear resistance, and a low-friction outer surface. The insert features a 55-degree diamond shape (Insert Shape Code D), a 3\/8-inch inscribed circle, and a 0.40 mm corner radius. The UM chip breaker geometry promotes reliable chip control across a range of feed rates and depths of cut. This insert is installed by machinists and CNC operators working in production turning environments.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for turning steel as its primary workpiece material and cast iron as a secondary workpiece material, consistent with its ISO grade 4425 designation and P\/K material group ratings. It is part of the CoroTurn 107 series, which is engineered for external and internal turning with positive cutting geometries. Typical applications include finishing and semi-finishing passes on ferrous components in job shop and production settings. The neutral hand orientation allows use in standard right-hand toolholders configured for DCMT-style inserts.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for extended tool life on steel and cast iron\u003c\/li\u003e\n  \u003cli\u003e55-degree diamond insert shape with 7-degree relief angle (Clearance Code C) for positive, free-cutting action\u003c\/li\u003e\n  \u003cli\u003e0.40 mm corner radius balances edge strength with surface finish quality\u003c\/li\u003e\n  \u003cli\u003eUM chip breaker geometry for consistent chip control in steel turning\u003c\/li\u003e\n  \u003cli\u003eTwo cutting edges per insert for cost efficiency\u003c\/li\u003e\n  \u003cli\u003eScrew and clamp compatible holding method for secure seating in toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in DCMT-style toolholders within the CoroTurn 107 series. ISO code DCMT 11 T3 04-UM 4425. Compatible toolholders must accept a 3\/8-inch inscribed circle insert with a 4.40 mm hole diameter and DCMT seating geometry. Verify toolholder specifications before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before changing inserts. Seat the insert fully against the pocket locating surfaces before tightening the clamp or screw to the toolholder manufacturer's specified procedure. Inspect the insert pocket and shim for damage or debris before each insert change to avoid seating errors that can cause premature edge failure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: DCMT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (55-degree included angle)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inch (0.3750 inch \/ 9.53 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.40 mm (0.0156 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1563 inch (3.97 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees (Clearance Code C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1732 inch (4.40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: UM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN, Al2O3, TiN (CVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (ISO Code P)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Cast Iron (ISO Code K)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHolding Method\u003c\/strong\u003e: Clamp and Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: DCMT 11 T3 04-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 Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 7860871\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51733350678834,"sku":"7860871","price":35.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/20cd0d0e422b80021fe823b8256f21f1_c6fe1673-4aed-4326-a98a-8fd02dc8dae5.jpg?v=1788754540","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7860871-turning-insert-dcmt32-51-um","provider":"Voomi Supply","version":"1.0","type":"link"}