{"product_id":"sandvik-coromant-7859251-turning-insert-cnmg543-pr-4415","title":"Sandvik Coromant 7859251 Turning Insert CNMG543-PR 4415","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7859251 is a CNMG-style indexable turning insert designed for external and internal turning operations on CNC lathes and turning centers. This insert carries the manufacturer grade 4415 and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, providing wear resistance and thermal protection during continuous and interrupted cutting. It has an 80-degree diamond insert shape, a 5\/8-inch (0.6250 inch) inscribed circle, a 1.19 mm (0.0469 inch) corner radius, and a 1\/4-inch insert thickness. Part of the T-Max P series, it is suited for medium to finishing passes where edge security and surface finish are critical. Machinists and CNC operators install and index these inserts as part of routine tooling maintenance.\u003c\/p\u003e\u003cp\u003eThis insert is rated primarily for steel (ISO material code P) and secondarily for cast iron (ISO material code K), covering a wide range of ferrous turning applications. The PR chip breaker geometry is engineered to control chip flow and reduce cutting forces in medium-duty turning. Its neutral hand orientation makes it compatible with right-hand and left-hand toolholders designed for CNMG-style inserts. The ISO designation for this insert is CNMG 16 06 12-PR 4415. Typical applications include turning of shafts, flanges, housings, and other ferrous components on production turning equipment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for wear and thermal resistance\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape (shape code C) with 4 cutting edges for maximum indexing value\u003c\/li\u003e\n\u003cli\u003ePR chip breaker geometry for controlled chip flow in medium turning of steel and cast iron\u003c\/li\u003e\n\u003cli\u003e1.19 mm corner radius balances edge strength with surface finish capability\u003c\/li\u003e\n\u003cli\u003eNeutral hand — compatible with standard CNMG toolholder pockets\u003c\/li\u003e\n\u003cli\u003eClamp and screw holding method for secure seating in the pocket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eThis insert is compatible with toolholders designed to accept CNMG-style inserts with a 5\/8-inch inscribed circle (ISO size 16), 1\/4-inch thickness, and a 0.2500-inch hole diameter. It is part of the SANDVIK COROMANT T-Max P series tooling system. Verify that the toolholder pocket geometry and clamping method match the clamp-and-screw configuration before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eIndexable turning inserts are installed and indexed by qualified machinists and CNC tooling technicians. Always bring the spindle to a complete stop and follow lockout procedures before accessing the turret or toolholder. Use the correct torque wrench and insert key specified by the toolholder manufacturer when tightening the clamping screw — do not use impact tools. Inspect the insert pocket seat for chips or debris before seating a new insert to ensure full contact and accurate tool-nose positioning.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CNMG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMG 16 06 12-PR 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: 80-degree Diamond (Shape Code C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\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: PR\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: 5\/8 inch (0.6250 inch \/ 15.88 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1.19 mm (0.0469 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/4 inch (0.2500 inch \/ 6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2500 inch (6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\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\u003eClearance Code\u003c\/strong\u003e: N\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 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 Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: T-Max P\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: 0.04 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: 7859251\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51748276863282,"sku":"7859251","price":402.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/adbec394d4f86a78adae52f8cabc07dc_099552fc-6ceb-45ff-b7ca-0171c21d5776.jpg?v=1788891616","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859251-turning-insert-cnmg543-pr-4415","provider":"Voomi Supply","version":"1.0","type":"link"}