{"product_id":"seco-02959957-turning-insert-dnmu332-m3-tp2501-diamond-55","title":"Seco 02959957 Turning Insert DNMU332-M3 TP2501 Diamond 55","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SECO 02959957 is a solid carbide turning insert in the DNMU-M3 series, designed for precision metal cutting in CNC turning applications. It features a 55-degree diamond shape (DNMU style) with a neutral hand orientation and four usable cutting edges. The insert carries a CVD-applied Duratomic multilayer coating consisting of TiCN, Al2O3, and Cr, achieving manufacturer grade TP2501. With an inscribed circle of 0.375 inches, a corner radius of 0.0315 inches, and an insert thickness of 0.1874 inches, this insert is built for reliable stock removal across a range of ferrous workpiece materials. It is installed using clamp, pin, or lever-lock holding methods.\u003c\/p\u003e\u003cp\u003eThis insert is suited for steel, stainless steel, and cast iron machining in both roughing and semi-finishing operations. The M3 chip breaker geometry supports turning, facing, boring, and back turning on CNC lathes and turning centers in production environments. Material grades P10, P20, P30, and P35 make it appropriate for a wide band of steel and stainless applications. The Chamfered and Honed cutting edge style provides a controlled edge condition that reduces micro-chipping under interrupted or continuous cut conditions. It is sold individually but must be ordered in multiples of 10.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e55-degree diamond insert shape (shape code D) with negative rake for increased edge strength\u003c\/li\u003e\n\u003cli\u003eCVD Duratomic multilayer coating: TiCN, Al2O3, and Cr for wear and crater resistance\u003c\/li\u003e\n\u003cli\u003eFour cutting edges per insert, multi-tipped for maximum economy\u003c\/li\u003e\n\u003cli\u003eM3 chip breaker supports turning, facing, boring, and back turning operations\u003c\/li\u003e\n\u003cli\u003eCompatible with clamp, pin, and lever-lock toolholding systems\u003c\/li\u003e\n\u003cli\u003eChamfered and Honed cutting edge style for improved edge stability\u003c\/li\u003e\n\u003cli\u003eConforms to ANSI and ISO standards; ISO code DNMU110408-M3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in DNMU-series toolholders that accept a 55-degree diamond insert with a 0.375-inch inscribed circle, neutral hand, clamp, pin, or lever-lock holding, and a clearance code of N. Confirmed compatible workpiece materials include steel, stainless steel, and cast iron.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the turret is indexed to a safe position before seating or replacing inserts. Use the appropriate torque driver for the selected clamping method — clamp, pin, or lever-lock — per the toolholder manufacturer specification. Verify insert seating and edge orientation before resuming cuts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: DNMU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: DNMU-M3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond 55\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape Code\u003c\/strong\u003e: D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 55 degrees\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.375 inches (3\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1874 inches (3\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.9134 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0315 inches (1\/32 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.150 inches (3.81 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.375 inches (11.60 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.4252 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 Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN, Al2O3, Cr (CVD Duratomic)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: TP2501\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: P10, P20, P30, P35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: M3\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\u003eCoating Process\u003c\/strong\u003e: CVD\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\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, Pin, Lever Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Stainless Steel, Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Back Turning, Boring, Facing, Turning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: DNMU110408-M3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: DNMU332-M3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 (minimum order quantity: 10)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: SECO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 02959957\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51561533079858,"sku":"02959957","price":265.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac4eb6df8193b185001ef0107c0ca5d9_4a4b70eb-39ed-45d2-82cf-9742fa8a0a0b.jpg?v=1786465219","url":"https:\/\/voomisupply.com\/products\/seco-02959957-turning-insert-dnmu332-m3-tp2501-diamond-55","provider":"Voomi Supply","version":"1.0","type":"link"}