{"product_id":"kennametal-4050535-npr131-kcu25-carbide-profiling-insert","title":"Kennametal 4050535 NPR131 KCU25 Carbide Profiling Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4050535 is a solid carbide profiling and turning insert in the Top Notch series, grade KCU25 with an AlTiN PVD coating. It features a parallelogram shape (NPR131 style) with a negative rake angle of 10 degrees and four cutting edges, making it suitable for high-productivity turning operations. The insert measures 0.499 inches in length, 0.1875 inches thick, and carries a 0.0156-inch corner radius. With a maximum depth of cut of 0.1663 inches and a 55-degree included angle, this insert is engineered for profiling passes where edge geometry and workpiece finish matter. It is screw-held and right-hand oriented. Installation requires compatible Top Notch toolholders designed for NPR-style inserts.\u003c\/p\u003e\u003cp\u003eThis insert is suited for both roughing profiles and finish turning across a wide range of workpiece materials. Primary workpiece materials include steel, stainless steel, cast iron, non-ferrous metals, and superalloys including titanium (ISO material codes P, M, K, N, and S). Typical applications include CNC turning centers and manual lathes in job shop, production machining, and maintenance environments where consistent edge performance and extended tool life are required. The KCU25 carbide grade with fine grain substrate and PVD AlTiN coating is well matched to demanding interrupted cuts and varying material hardness.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide fine grain substrate, grade KCU25 with PVD AlTiN coating for wear resistance\u003c\/li\u003e\n\u003cli\u003eFour cutting edges per insert for extended tool life and reduced per-edge cost\u003c\/li\u003e\n\u003cli\u003eParallelogram (NPR131) shape with 55-degree included angle optimized for profiling\u003c\/li\u003e\n\u003cli\u003eNegative rake geometry with 0-degree relief angle and common chipbreaker\u003c\/li\u003e\n\u003cli\u003eScrew-held, right-hand orientation for secure clamping in Top Notch toolholders\u003c\/li\u003e\n\u003cli\u003eCompatible with ISO designation KNGX150404R20 and NPR131F standard\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Top Notch series screw-clamping toolholders accepting NPR131-style inserts. ISO equivalent designation is KNGX150404R20. Also referenced under manufacturer number NPR131F.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the toolholder is secure in the turret before changing inserts. Use the manufacturer-specified torque wrench for the clamping screw to avoid insert cracking or seat damage. Verify insert seating and orientation before returning the machine to operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NPR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 131F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape\u003c\/strong\u003e: Parallelogram\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide, Fine Grain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCU25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.499 inches (12.70 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Height\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1875 inches (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0156 inches (0.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.373 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.1663 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 55 degrees\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\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: Common\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Top Notch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: KNGX150404R20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.025 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: 4050535\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51736263688498,"sku":"4050535","price":238.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a7a7454e2b39eebad9a7057cad555384.jpg?v=1788776828","url":"https:\/\/voomisupply.com\/products\/kennametal-4050535-npr131-kcu25-carbide-profiling-insert","provider":"Voomi Supply","version":"1.0","type":"link"}