{"product_id":"sandvik-coromant-7859243-turning-insert-cnmg431-wf-4415","title":"Sandvik Coromant 7859243 Turning Insert CNMG431-WF 4415","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7859243 is a CNMG-style indexable turning insert in the T-Max P series, designed for external and internal turning operations on CNC lathes and turning centers. Manufactured from solid carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, this insert delivers wear resistance and thermal protection during continuous and interrupted cutting. The 80-degree diamond shape (insert shape code C) provides a strong cutting edge geometry suited to general-purpose turning. It features a WF chip breaker, a 0.4 mm corner radius, and a neutral hand orientation. Installation and application are handled by machinists and tooling specialists in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis insert is optimized for cutting steel as its primary workpiece material and cast iron as the secondary workpiece material, aligning with ISO material groups P and K respectively. The WF chip breaker geometry is suited to finishing and light roughing passes where controlled chip evacuation and surface finish consistency are priorities. The insert mounts using clamp or screw holding methods and is compatible with standard CNMG 1204 toolholders. With four cutting edges per insert, it supports efficient tooling economics in high-volume turning applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for wear and heat resistance\u003c\/li\u003e\n\u003cli\u003eWF chip breaker geometry for finishing and light roughing on steel and cast iron\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape with 0.4 mm corner radius for versatile profiling\u003c\/li\u003e\n\u003cli\u003eFour usable cutting edges per insert\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation fits a wide range of standard toolholders\u003c\/li\u003e\n\u003cli\u003eClamp and screw compatible holding method for secure seating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard CNMG 1204-format toolholders accepting clamp or screw mounting. Primary workpiece material compatibility is steel (ISO P); secondary compatibility is cast iron (ISO K). Part of the SANDVIK COROMANT T-Max P series. ISO code: CNMG 12 04 04-WF 4415.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert indexing and replacement should be performed by a qualified machinist with the machine fully stopped and the spindle locked out per applicable machine safety procedures. Inspect the toolholder pocket and clamping components for wear or debris before seating a new insert. Use the correct torque wrench for the clamping screw to avoid fracturing the carbide substrate. Do not use a damaged or worn seat surface, as uneven support will reduce edge life and can cause insert breakage.\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\u003eInsert Shape\u003c\/strong\u003e: Diamond (80 degree, 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\u003eSeries\u003c\/strong\u003e: T-Max P\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: WF\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: 0.4 mm (0.0156 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 12.70 mm (0.2030 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 4.76 mm (0.1875 inches)\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\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, 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: CNMG 12 04 04-WF 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\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: 0.3 pounds\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: 7859243\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51730094391602,"sku":"7859243","price":296.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e082784b10b5ce64084749864a259dc0_2e016b34-07f1-46d3-a4d0-2ca669129b18.jpg?v=1788711692","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859243-turning-insert-cnmg431-wf-4415","provider":"Voomi Supply","version":"1.0","type":"link"}