{"product_id":"kennametal-1161958-tpmt21-51lf-kc730-carbide-turning-insert","title":"Kennametal 1161958 TPMT21.51LF KC730 Carbide Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 1161958 is a solid carbide turning insert in the TPMT style, designed for precision metal removal in turning, facing, and boring operations. Identified by the industry code TPMT21.51LF, this insert carries the KC730 grade designation and features a physical vapor deposition (PVD) TiN coating for high wear resistance across a broad range of workpiece materials. The insert has a 60-degree triangle shape with a positive rake angle of 5 degrees, an 11-degree relief angle, and a honed cutting edge. With a 1\/4-inch inscribed circle and a 1\/64-inch corner radius, it is optimized for finishing and light machining passes. The screw-on holding method provides secure seating in compatible toolholders, and three available cutting edges extend tool life per insert.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for finishing and light machining of steel, stainless steel, cast iron, superalloys, and titanium in both turning and boring applications. The KC730 grade delivers high to moderate wear resistance and toughness, making it a practical choice for shop environments running mixed material jobs. Typical use cases include CNC lathe operations on P-, M-, and K-class workpiece materials where consistent surface finish and dimensional accuracy are required. The LF chip breaker geometry supports controlled chip evacuation at lighter depths of cut, reducing the risk of chip recutting and workpiece damage on finishing passes.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKC730 grade with PVD TiN coating for high wear resistance on steel, stainless steel, and cast iron\u003c\/li\u003e\n  \u003cli\u003eLF chip breaker geometry engineered for finishing and light machining operations\u003c\/li\u003e\n  \u003cli\u003e60-degree triangle insert shape with three usable cutting edges per insert\u003c\/li\u003e\n  \u003cli\u003ePositive rake angle and positive side clearance reduce cutting forces on light passes\u003c\/li\u003e\n  \u003cli\u003eScrew-on mounting method for repeatable, rigid insert indexing\u003c\/li\u003e\n  \u003cli\u003eHoned cutting edge style reduces micro-chipping at the cutting edge on difficult materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in TPMT-style screw-on toolholders conforming to ANSI insert code TPMT2151 and ISO insert code TPMT110204. Compatible with turning, facing, and boring applications on steel, stainless steel, cast iron, superalloys, and titanium workpieces. Conforms to ANSI and ISO standards for interchangeability with holders designed for this insert form factor.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine before indexing or replacing inserts. Use the appropriate torx or hex key to seat the screw-on fastener; do not overtighten, as this can crack the carbide body. Inspect the insert pocket and seating surface for chips or debris before placing a new insert, as contamination can cause premature edge failure or dimensional shift.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: TPMT2151\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: TPMT110204\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: TPMT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: T - Triangle (60 degrees included angle)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KC730\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2, C3, C4\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: TiN (PVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: LF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker Operation\u003c\/strong\u003e: Finishing, Light Machining\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.25 inches (1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0156 inches (1\/64 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 11 mm (0.4331 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.0938 inches (3\/32 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1142 inches (2.80 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 1.25 mm (0.0492 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 11 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 5 degrees positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw-On\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Superalloys, Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: Turning, Facing, Boring\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: 0.0031 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: KENNAMETAL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1161958\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51751273070898,"sku":"1161958","price":202.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/869216d5148f2409b73af73ded405a97.jpg?v=1788922599","url":"https:\/\/voomisupply.com\/products\/kennametal-1161958-tpmt21-51lf-kc730-carbide-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}