{"product_id":"sandvik-coromant-7861072-turning-insert-vbmt331-pm-4425","title":"Sandvik Coromant 7861072 Turning Insert VBMT331-PM 4425","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7861072 is a VBMT-style turning insert in the CoroTurn 107 series, designed for external turning operations on CNC lathes and turning centers. It is manufactured from solid carbide with a CVD-applied multilayer coating consisting of Al2O3, TiN, and TiCN, which provides thermal resistance and wear protection during continuous and light interrupted cuts. The insert features a 35-degree diamond shape, a 3\/8-inch inscribed circle, and a 0.40 mm corner radius. It carries a neutral hand orientation and uses the PM chip breaker geometry. Licensed machinists and CNC operators install this insert type in production turning environments.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for turning steel and cast iron workpieces in both roughing and finishing passes where controlled chip formation is required. The PM chip breaker is engineered for medium machining of steel, offering reliable chip evacuation at moderate feed rates and depths of cut. It is appropriate for residential machine shops, job shops, and production facilities running medium-to-high volume turning cycles. The CoroTurn 107 series is designed for positive-rake toolholders accepting VBMT-style inserts with a 3\/8-inch inscribed circle and a clamp or screw holding method.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: Al2O3, TiN, and TiCN for extended tool life in steel and cast iron applications\u003c\/li\u003e\n  \u003cli\u003e35-degree diamond insert shape (Shape Code V) for access in tight turning profiles\u003c\/li\u003e\n  \u003cli\u003ePM chip breaker geometry optimized for medium turning of steel workpieces\u003c\/li\u003e\n  \u003cli\u003e0.40 mm corner radius for balanced edge strength and surface finish\u003c\/li\u003e\n  \u003cli\u003eTwo cutting edges per insert, neutral hand orientation\u003c\/li\u003e\n  \u003cli\u003eManufacturer Grade 4425, ISO Code VBMT 16 04 04-PM 4425\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CoroTurn 107 series positive-rake toolholders accepting VBMT-style inserts with a 3\/8-inch inscribed circle, clamp or screw holding method, and a B clearance code with M tolerance. Primary workpiece material is steel (ISO Code P); secondary workpiece material is cast iron (ISO Code K).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCNC machinists and toolroom technicians install turning inserts of this type. Power down and lock out the machine spindle before seating or replacing the insert. Use the correct torque driver for the clamping screw to avoid insert movement or edge chipping during the cut. Inspect the insert pocket and seating surface for debris or wear before installation to ensure proper insert contact and runout.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: VBMT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 35 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape Code\u003c\/strong\u003e: V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inches (0.3750 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.40 mm (0.0156 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/16 inches (0.1875 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1732 inches (4.40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 5 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: B\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: PM\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: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Al2O3, TiN, TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWiper Edge\u003c\/strong\u003e: No\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 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\u003eISO Code\u003c\/strong\u003e: VBMT 16 04 04-PM 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 1604\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: 5.08 inches L x 2.13 inches W x 0.54 inches H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.54 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 7861072\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51730665439538,"sku":"7861072","price":44.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ecc487030b3b89c42411f9f3f76b681b.jpg?v=1788721119","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7861072-turning-insert-vbmt331-pm-4425","provider":"Voomi Supply","version":"1.0","type":"link"}