{"product_id":"kennametal-1624431-turning-insert-vnmg331fn-kt315-cermet","title":"Kennametal 1624431 Turning Insert VNMG331FN KT315 Cermet","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1624431 is a VNMG331FN turning insert in grade KT315, designed for precision finishing operations on CNC lathes and turning centers. The insert is manufactured from cermet substrate and carries a multilayer PVD coating in a TiN\/TiCN\/TiN sequence, which delivers high wear resistance across a range of workpiece materials. The VNMG geometry features a 35-degree diamond (rhombic) shape, a neutral hand orientation, a 0.0156-inch corner radius, and a negative rake with zero-degree relief angle. With four usable cutting edges per insert, it is a cost-effective solution for high-volume turning applications requiring tight tolerances and consistent surface finish.\u003c\/p\u003e\u003cp\u003eThis insert is suited for finishing passes on steel, stainless steel, and cast iron in both residential-shop and industrial production environments. Typical applications include turning, facing, boring, back turning, and back boring. The FN chip breaker geometry is optimized for finishing cuts with a maximum depth of cut of 0.0492 inches (1.25 mm), making it appropriate for light, precise material removal where surface quality is the priority. It is held in KENLOC-style toolholders using a clamp-and-pin method.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eKT315 cermet grade with multilayer PVD TiN\/TiCN\/TiN coating for high wear resistance\u003c\/li\u003e\n\u003cli\u003eFN chip breaker optimized for finishing operations on steel, stainless steel, and cast iron\u003c\/li\u003e\n\u003cli\u003e35-degree diamond (VNMG) shape with four cutting edges for extended tool life per insert\u003c\/li\u003e\n\u003cli\u003eNegative rake, zero-degree relief (side clearance: negative) for stable, chatter-resistant cuts\u003c\/li\u003e\n\u003cli\u003eCompatible with clamp-and-pin insert holding — fits KENLOC-style toolholders\u003c\/li\u003e\n\u003cli\u003eHoned cutting edge style for improved edge integrity on fine finishing passes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in KENLOC-series toolholders accepting VNMG-style inserts. Conforms to ANSI insert code VNMG331 and ISO insert code VNMG160404. Suitable for turning, facing, boring, back turning, and back boring of steel (P), stainless steel (M), and cast iron (K) workpiece materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before changing inserts. Seat the insert fully against the toolholder pocket surfaces before engaging the clamp and pin, and verify there is no rocking or gap before taking a cut. Follow the toolholder manufacturer torque specifications for the clamp screw — do not overtighten, as cermet is brittle and susceptible to fracture under uneven clamping load.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: VNMG331\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: VNMG160404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: V - Diamond (Rhombic) 35-Degree\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Cermet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KT315\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN\/TiCN\/TiN Multilayer PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: FN (Finishing)\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: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 16.61 mm (0.6537 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/16 inch (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/64 inch (0.0156 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.0492 inches (1.25 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1500 inches (3.81 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 10 degrees (negative)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\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 and Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel (P), Stainless Steel (M), Cast Iron (K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENLOC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0095 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1624431\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51754714890546,"sku":"1624431","price":203.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/53adb9e8bfdd4bd63eaed022432ae63b.jpg?v=1788948043","url":"https:\/\/voomisupply.com\/products\/kennametal-1624431-turning-insert-vnmg331fn-kt315-cermet","provider":"Voomi Supply","version":"1.0","type":"link"}