{"product_id":"sandvik-coromant-7859259-turning-insert-dnmg432-pr-4415","title":"Sandvik Coromant 7859259 Turning Insert DNMG432-PR 4415","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7859259 is a DNMG432-PR 4415 turning insert designed for external turning operations on CNC lathes and turning centers. It features a 55-degree diamond insert shape with a neutral hand orientation and four cutting edges, maximizing tool life per insert. The carbide substrate carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal protection during continuous and interrupted steel cutting. The 0.79 mm corner radius and PR chip breaker geometry are engineered for controlled chip formation at moderate to high feed rates. Licensed machinists and CNC operators install this insert as a direct replacement in T-Max P compatible toolholders.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for turning steel and cast iron workpieces in both roughing and semi-finishing applications. The PR chip breaker is optimized for primary use on steel (ISO P) and secondary use on cast iron (ISO K) at moderate depths of cut and feed. It is a standard choice in job shop and production turning environments where consistent chip control and predictable tool life are required. The ISO code for this insert is DNMG 15 04 08-PR 4415, and it is cataloged by the manufacturer as DNMG 432-PR 4415.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for extended wear resistance\u003c\/li\u003e\n  \u003cli\u003e55-degree diamond insert shape with 4 usable cutting edges\u003c\/li\u003e\n  \u003cli\u003e0.79 mm (0.0313 inch) corner radius for balanced edge strength and surface finish\u003c\/li\u003e\n  \u003cli\u003ePR chip breaker optimized for steel and cast iron turning\u003c\/li\u003e\n  \u003cli\u003eNeutral hand orientation fits both left- and right-hand toolholder setups\u003c\/li\u003e\n  \u003cli\u003eCompatible with clamp and screw insert holding methods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with T-Max P series turning toolholders accepting DNMG 15 04 08 style inserts. Compatible with toolholders using clamp or screw clamping methods. Primary workpiece material is steel (ISO P); secondary workpiece material is cast iron (ISO K).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCNC machinists and toolroom technicians install turning inserts. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key to seat the insert firmly against the pocket seat and clamping mechanism — do not overtighten the clamp screw. Inspect the insert pocket for chips or debris before seating a new insert to ensure accurate positioning and prevent edge chipping.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: DNMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: DNMG 15 04 08-PR 4415\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: 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\u003eInsert Shape\u003c\/strong\u003e: Diamond (55 degrees)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.79 mm (0.0313 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5000 inch (12.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inch (4.76 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2030 inch (5.16 mm)\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\u003eChip Breaker\u003c\/strong\u003e: PR\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\u003eSeries\u003c\/strong\u003e: T-Max P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 2.13 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Length\u003c\/strong\u003e: 5.08 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 0.53 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 7859259\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51748167221554,"sku":"7859259","price":323.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bd635f9b63938a46aa4eb937521c017a_c30f881d-e3cf-40bb-8f1f-06409d1d6401.jpg?v=1788889884","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859259-turning-insert-dnmg432-pr-4415","provider":"Voomi Supply","version":"1.0","type":"link"}