{"product_id":"sandvik-coromant-7860817-turning-insert-dcmt21-52-pm","title":"Sandvik Coromant 7860817 Turning Insert DCMT21.52-PM","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7860817 is a solid carbide turning insert in the CoroTurn 107 series, designed for external and internal turning operations on CNC lathes and turning centers. It carries the ISO designation DCMT 07 02 08-PM 4425 and features a 55-degree diamond shape (Insert Shape Code D) with a 7-degree relief angle. The insert is CVD-coated with a TiCN, Al2O3, and TiN multilayer stack under grade 4425, optimizing wear resistance and thermal stability. The PM chip breaker geometry is engineered for steel and cast iron machining at productive cutting parameters. Two cutting edges per insert are available, and the neutral hand orientation suits a wide range of toolholder setups.\u003c\/p\u003e\u003cp\u003eThis insert is suited for finishing to medium roughing passes on steel (ISO P) as the primary workpiece material, with cast iron (ISO K) as a secondary application. The PM chip breaker geometry controls chip flow across a broad feed and depth-of-cut range, making this insert a practical choice for general-purpose turning in both job-shop and production environments. It fits CoroTurn 107 toolholders that accept DCMT-style inserts with a clamp and screw holding method.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e55-degree diamond insert shape with 7-degree relief angle for positive cutting action\u003c\/li\u003e\n\u003cli\u003eCVD multilayer coating: TiCN, Al2O3, TiN under manufacturer grade 4425 for extended tool life on steel and cast iron\u003c\/li\u003e\n\u003cli\u003ePM chip breaker geometry optimized for ISO P steel and ISO K cast iron applications\u003c\/li\u003e\n\u003cli\u003e0.79 mm (0.0313 inch) corner radius balances edge strength and surface finish\u003c\/li\u003e\n\u003cli\u003eTwo usable cutting edges per insert for cost efficiency\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation compatible with a broad range of DCMT toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CoroTurn 107 series toolholders that accept DCMT-style inserts with clamp and screw holding. ISO code DCMT 07 02 08-PM 4425. Manufacturers catalog number DCMT 2(1.5)2-PM 4425.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert seating and clamping should be performed by a qualified machinist or toolroom technician following the toolholder manufacturer's torque and clamping specifications. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and seating surface for chips or debris before installing a new insert, as contamination will affect runout and edge life. Follow applicable shop safety procedures and machine tool manufacturer guidelines when handling carbide inserts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\u003eISO Code\u003c\/strong\u003e: DCMT 07 02 08-PM 4425\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: Solid Carbide\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\u003eChip Breaker\u003c\/strong\u003e: PM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.79 mm (0.0313 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 1\/4 inch (0.2500 inches \/ 6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/32 inch (0.0938 inches \/ 2.38 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1102 inches (2.80 mm)\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 and 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\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.74 inches (L) x 1.54 inches (W) x 0.43 inches (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\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: 7860817\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51739086192946,"sku":"7860817","price":207.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/955fc376a5a4427df423cdb94114c4f6_66985d5d-1899-4f1f-8707-240ba36f89a6.jpg?v=1788809176","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7860817-turning-insert-dcmt21-52-pm","provider":"Voomi Supply","version":"1.0","type":"link"}