{"product_id":"iscar-5550321-dnmg431nf-ic8250-turning-insert-isoturn","title":"Iscar 5550321 DNMG431NF IC8250 Turning Insert Isoturn","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ISCAR 5550321 is a DNMG431NF IC8250 grade solid carbide turning insert designed for precision external and internal turning operations on CNC lathes and turning centers. The insert is manufactured to ISO 13399 standards and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN for wear resistance and thermal stability. The 55-degree diamond insert shape (Code D) provides a sharp, accessible cutting geometry suited to finish and semi-finish turning passes. The IC8250 grade is engineered for consistent performance at elevated cutting speeds on difficult-to-machine materials. Machinists and CNC operators in production and job-shop environments are the primary installers of this insert.\u003c\/p\u003e\u003cp\u003eThe DNMG431NF is built for turning stainless steel and carbon or alloy steel workpieces. The NF chip breaker geometry is suited to finishing operations where controlled chip formation and surface quality are critical. This insert fits within the Isoturn series tool holders and is also rated for boring applications, making it a versatile option in multi-operation setups. The DNMG geometry with a positive rake angle reduces cutting forces, which is an advantage when machining thin-walled or deflection-sensitive stainless components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIC8250 grade with CVD multilayer TiCN, Al2O3, and TiN coating for heat and wear resistance\u003c\/li\u003e\n\u003cli\u003e55-degree diamond insert shape (Code D) with positive rake for reduced cutting forces\u003c\/li\u003e\n\u003cli\u003eNF chip breaker geometry optimized for finish turning and chip control on steel and stainless\u003c\/li\u003e\n\u003cli\u003e0.5 inches inscribed circle and 1\/64 inch (0.016 inch) corner radius per DNMG431 sizing\u003c\/li\u003e\n\u003cli\u003eMaximum depth of cut of 0.138 inches (3.51 mm) for controlled material removal\u003c\/li\u003e\n\u003cli\u003eClamp and pin holding method compatible with standard DNMG-seat tool holders\u003c\/li\u003e\n\u003cli\u003eRated for boring applications in addition to external turning\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in DNMG-seat tool holders within the ISCAR Isoturn series. Compatible with standard DNMG 431 insert pockets using clamp or pin holding methods. Primary workpiece material compatibility includes stainless steel (ISO material code M) and carbon or alloy steel (ISO material code P).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified CNC machinists or tooling technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the appropriate torx or hex key to the tool holder manufacturer's specified procedure when securing the clamp or pin — do not overtighten by hand estimation alone. Inspect the insert pocket for chips or debris before seating the insert to ensure proper contact and accurate tool-length compensation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: DNMG 431-NF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: IC8250\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, 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, Code D)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 15.49 mm (0.61 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.187 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.016 inches (1\/64 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.138 inches (3.51 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: NF\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\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Stainless Steel, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Isoturn\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Boring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ISO 13399\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: ISCAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5550321\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51731084542258,"sku":"5550321","price":321.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4b9db7a76c73ef441c66288a26570852.jpg?v=1788726797","url":"https:\/\/voomisupply.com\/products\/iscar-5550321-dnmg431nf-ic8250-turning-insert-isoturn","provider":"Voomi Supply","version":"1.0","type":"link"}