{"product_id":"kennametal-5591154-vbmt221lf-carbide-turning-insert","title":"Kennametal 5591154 VBMT221LF Carbide Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 5591154 is a solid carbide turning insert with ANSI insert code VBMT221 and ISO code VBMT110304LF, designed for precision finishing and light machining operations. It carries the KCM25B grade designation and features a multilayer CVD coating consisting of TiCN, Al2O3, and TiOCN applied via MTCVD process. The 35-degree diamond (rhombic) shape provides a sharp, positive rake angle of 5 degrees with a 5-degree relief angle and a honed cutting edge style. With a 0.0156-inch corner radius and a 0.25-inch inscribed circle, this insert suits applications where tight tolerances and fine surface finishes are required. Licensed HVAC, machining, and metalworking professionals specify this insert for ferrous and exotic-alloy turning work.\u003c\/p\u003e\n\u003cp\u003eThis insert is rated for use on steel, stainless steel, superalloys, and titanium workpiece materials, corresponding to ISO material codes P and M. The LF chip breaker geometry is optimized for finishing and light machining passes, keeping chip control predictable at lower depths of cut. It supports multiple operations including turning, facing, boring, back turning, and back boring, making it a versatile option for CNC lathe setups where a single insert geometry needs to handle varied tool paths. The screw-on holding method provides secure clamping and repeatable indexing during high-precision runs.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKCM25B grade with multilayer CVD coating: TiCN, Al2O3, and TiOCN for high toughness on steel and moderate wear resistance on stainless steel\u003c\/li\u003e\n  \u003cli\u003e35-degree diamond (V) insert shape with positive rake and positive side clearance for reduced cutting forces\u003c\/li\u003e\n  \u003cli\u003eLF chip breaker geometry suited for finishing and light machining operations\u003c\/li\u003e\n  \u003cli\u003e2 cutting edges per insert; screw-on holding method for secure, repeatable indexing\u003c\/li\u003e\n  \u003cli\u003eHoned cutting edge style minimizes micro-chipping on difficult-to-machine alloys including superalloys and titanium\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI and ISO standards; multi-use application across turning, facing, boring, back turning, and back boring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in screw-on style VBMT toolholders conforming to ANSI and ISO insert seating standards. Compatible with toolholders accepting a VBMT 221 or VBMT 110304 insert seat geometry. Verify holder pocket clearance angle (B clearance, M tolerance) before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC setup technician with the machine fully stopped, spindle locked, and all energy sources isolated before indexing or replacing inserts. Use the appropriate torx or hex key to torque the screw-on clamp fastener to the toolholder manufacturer's specified value. Inspect the insert pocket and seating surface for chips or debris before seating the insert, as contamination in the pocket can cause insert rocking and premature edge failure. Do not exceed the maximum depth of cut of 0.2903 inches stated for this insert geometry.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: VBMT221\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: VBMT110304LF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: VBMT221LF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: V - Diamond (Rhombic) 35 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCM25B\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, TiOCN (Multilayer CVD, MTCVD 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\u003eCorner Radius\u003c\/strong\u003e: 0.0156 inches (1\/64 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.25 inches (1\/4 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 11.70 mm \/ 0.8718 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.125 inches (1\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.25 inches (1\/4 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1102 inches (2.80 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2903 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 5 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\u003eClearance Code\u003c\/strong\u003e: B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHolding Method\u003c\/strong\u003e: Screw-On\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Superalloys, Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C1, C2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable Operations\u003c\/strong\u003e: Turning, Facing, Boring, Back Turning, Back Boring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 5591154\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51728494952754,"sku":"5591154","price":215.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/abc73806056d6e6f1cb56cbbc727bc62.jpg?v=1788692133","url":"https:\/\/voomisupply.com\/products\/kennametal-5591154-vbmt221lf-carbide-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}