{"product_id":"sandvik-coromant-7859204-turning-insert-cnmm643-pr-4415","title":"Sandvik Coromant 7859204 Turning Insert CNMM643-PR 4415","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7859204 is a solid carbide turning insert in the CNMM 643-PR 4415 designation, designed for high-productivity external turning operations on CNC lathes and turning centers. It carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability across a broad range of cutting speeds. The insert has a diamond (80-degree) shape with a neutral hand orientation, a 0.75 inches inscribed circle (19.05 mm), and a corner radius of 0.0469 inches (1.19 mm). It belongs to the Sandvik T-Max P series, engineered for reliable chip control and long tool life on steel and cast iron workpieces. Machinists and CNC operators in production turning environments install this insert.\u003c\/p\u003e\u003cp\u003eThis insert is intended for turning applications where the primary workpiece material is steel (ISO material group P) and the secondary workpiece material is cast iron (ISO material group K). It is well suited for medium to rough turning passes where consistent chip breaking and edge stability are required. The PR chip breaker geometry promotes controlled chip evacuation during interrupted and continuous cuts. Typical install scenarios include external diameter turning, facing, and light profiling on production CNC turning equipment. Two cutting edges are available per insert, and it is held using a clamp or screw clamping system on compatible toolholders.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD-applied TiCN, Al2O3, and TiN multilayer coating for thermal and wear resistance\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape (CNMM) with neutral hand orientation\u003c\/li\u003e\n\u003cli\u003ePR chip breaker geometry for controlled chip evacuation on steel and cast iron\u003c\/li\u003e\n\u003cli\u003e19.05 mm inscribed circle with 1.19 mm corner radius for medium to rough turning\u003c\/li\u003e\n\u003cli\u003eTwo cutting edges per insert for extended service life\u003c\/li\u003e\n\u003cli\u003eCompatible with clamp and screw clamping systems on T-Max P series toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement insert for use with SANDVIK COROMANT T-Max P series toolholders that accept CNMM-style inserts. ISO code CNMM 19 06 12-PR 4415 governs fitment. Confirm toolholder seat size and clamping method before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert installation should be performed by a qualified machinist or CNC tooling technician with the machine fully stopped and the spindle locked out per facility lockout\/tagout procedures. Use the appropriate torque wrench and clamping screw driver to seat the insert firmly against the pocket without over-torquing the clamping screw. Inspect the insert pocket for wear or debris before seating a new insert. Verify cutting parameters against the manufacturer grade 4415 recommendations for the specific workpiece material before resuming production.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMM 19 06 12-PR 4415\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\u003eManufacturer Grade\u003c\/strong\u003e: 4415\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\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\u003eInscribed Circle\u003c\/strong\u003e: 19.05 mm (0.3120 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1.19 mm (0.0469 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\u003eRelief Angle\u003c\/strong\u003e: 0 degrees (Clearance Code N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\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 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\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\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: 7859204\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51737199739186,"sku":"7859204","price":72.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fa6d16c43a44dbff9b3bb665fcea1183_72481d12-66fc-4988-8662-d709ff51f8c7.jpg?v=1788785515","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859204-turning-insert-cnmm643-pr-4415","provider":"Voomi Supply","version":"1.0","type":"link"}