{"product_id":"walter-7251975-turning-insert-vnmg331-mm5-wsm20s-carbide","title":"Walter 7251975 Turning Insert VNMG331-MM5 WSM20S Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WALTER 7251975 is a solid carbide turning insert in the VNMG-MM5 series, designed for precision metal removal on CNC lathes and turning centers. It carries the industry-standard designation VNMG331-MM5 WSM20S and features a multilayer PVD coating of TiCN, Al2O3, and aluminum for extended tool life in demanding cuts. The 35-degree diamond shape (Insert Shape Code V) provides a sharp, acute cutting geometry suited to finishing and light roughing passes. With a 3\/8-inch inscribed circle and a 0.016-inch corner radius, this insert delivers consistent edge performance across a range of depths of cut up to 0.654 inches.\u003c\/p\u003e\n\u003cp\u003eThis insert is engineered primarily for stainless steel and superalloys and titanium (ISO material codes M and S), with steel (ISO code P) as a secondary workpiece material. The MM5 chip breaker geometry is optimized for turning, facing, boring, and back turning operations in both light finishing and medium stock-removal applications. The neutral hand orientation makes it adaptable to standard right-hand and left-hand toolholders with VNMG-style pockets. It is typically specified by CNC machinists and toolroom operators working in aerospace, medical, and general precision machining environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003ePVD-applied TiCN and Al2O3 multilayer coating for heat and wear resistance on stainless steel and superalloys\u003c\/li\u003e\n  \u003cli\u003eMM5 chip breaker geometry supports turning, facing, boring, and back turning\u003c\/li\u003e\n  \u003cli\u003e35-degree diamond shape with 4 usable cutting edges for extended insert life\u003c\/li\u003e\n  \u003cli\u003e0.016-inch corner radius with chamfered and honed cutting edge for controlled surface finish\u003c\/li\u003e\n  \u003cli\u003eNegative rake, zero-degree relief angle (Clearance Code N) for rigid clamping stability\u003c\/li\u003e\n  \u003cli\u003eClamp and pin holding method compatible with standard VNMG toolholders\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI and ISO standards; ISO equivalent designation VNMG160404-MM5 WSM20S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in VNMG-style insert pockets that accept clamp and pin holding; compatible with toolholders specifying a VNMG 3\/8-inch inscribed circle, 3\/16-inch insert thickness, and 0.150-inch hole diameter. Suitable for material grades M20, S20, and P20 per ISO classification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by CNC machinists or toolroom personnel. Power down and lock out the machine spindle before seating or removing inserts. Use the correct torx or clamp screw torque driver as specified by the toolholder manufacturer  -  do not overtighten the clamp screw. Inspect the insert pocket and seating surfaces for chips or debris before installing a fresh insert to ensure proper seating and edge repeatability.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: VNMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: VNMG-MM5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Designation\u003c\/strong\u003e: VNMG160404-MM5 WSM20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond 35 degrees\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, Al (PVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: WSM20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: MM5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inches (0.375 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.654 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0157 inches (approximately 1\/64 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.150 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.654 inches\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 Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative (20 degrees)\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\u003eCutting Edge Style\u003c\/strong\u003e: Chamfered and Honed\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 Material\u003c\/strong\u003e: Stainless Steel; Superalloys and Titanium (ISO M, S)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Steel (ISO P)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M20, S20, P20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Turning, Facing, Boring, Back Turning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.029 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: WALTER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7251975\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":51972184310066,"sku":"7251975","price":524.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9127ff0f02bc61e848e6f7dd59263157.jpg?v=1789963904","url":"https:\/\/voomisupply.com\/products\/walter-7251975-turning-insert-vnmg331-mm5-wsm20s-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}