{"product_id":"sandvik-coromant-7860739-turning-insert-cnmm644-pr-4425","title":"Sandvik Coromant 7860739 Turning Insert CNMM644-PR 4425","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7860739 is a CNMM-style turning insert designed for high-productivity metal cutting on CNC lathes and turning centers. Part of the T-Max P series, this insert carries manufacturer grade 4425 and features a multilayer CVD coating of TiCN, Al2O3, and TiN applied over a solid carbide substrate. The coating sequence delivers thermal resistance, wear protection, and reduced built-up edge when cutting at elevated speeds. The PR chip breaker geometry is engineered for steel turning applications where reliable chip control and consistent tool life are the primary requirements. The neutral hand orientation makes it suitable for both external and face turning operations.\u003c\/p\u003e\u003cp\u003eThis insert is intended for turning operations on steel and cast iron workpieces, covering both roughing and semi-finishing passes where the PR geometry and 4425 grade perform best. It fits standard CNMM toolholders with clamp or screw clamping. The 80-degree diamond shape provides two cutting edges per insert, reducing cost per edge on production runs. Typical users include machinists and CNC operators in job shops, production facilities, and maintenance shops working on shafts, flanges, and similar turned components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eT-Max P series, grade 4425 carbide with CVD multilayer TiCN, Al2O3, TiN coating for extended tool life on steel\u003c\/li\u003e\n\u003cli\u003ePR chip breaker geometry optimized for steel primary workpiece material (ISO code P) and cast iron secondary (ISO code K)\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape (CNMM) with neutral hand for versatile external and face turning\u003c\/li\u003e\n\u003cli\u003e1\/16 inch (0.0625 inch) corner radius for a balance of edge strength and surface finish\u003c\/li\u003e\n\u003cli\u003eTwo cutting edges per insert for efficient cost-per-edge on production runs\u003c\/li\u003e\n\u003cli\u003eClamp and screw compatible holding method for use in standard CNMM-style toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned to fit standard CNMM-style turning toolholders that accept a 19.05 mm inscribed circle insert. ISO code CNMM 19 06 16-PR 4425. Compatible with clamp and screw clamping systems. Primary workpiece material: steel (ISO P). Secondary workpiece material: cast iron (ISO K).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC tooling technician with the machine in a full stop and lockout state before indexing or replacing inserts. Use the appropriate torx or hex key as specified by the toolholder manufacturer when tightening the clamping screw. Inspect the insert pocket and seating surface for chips or debris before seating the insert to ensure proper contact and prevent premature edge failure. Do not exceed the toolholder manufacturer recommended depth of cut or feed rate for this insert size and grade.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: T-Max P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4425\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CNMM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (80 degree included angle)\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: PR\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\u003eInscribed Circle\u003c\/strong\u003e: 19.05 mm (0.3120 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1.59 mm (0.0625 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 6.35 mm (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.3120 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\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\u003eISO Code\u003c\/strong\u003e: CNMM 19 06 16-PR 4425\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 5.08 inches L x 2.13 inches W x 0.53 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 insert per package (minimum order quantity: 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: 7860739\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51727115583794,"sku":"7860739","price":597.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fa6d16c43a44dbff9b3bb665fcea1183.jpg?v=1788673605","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7860739-turning-insert-cnmm644-pr-4425","provider":"Voomi Supply","version":"1.0","type":"link"}