{"product_id":"kennametal-1557820-ceramic-turning-insert-vnga331t0420","title":"Kennametal 1557820 Ceramic Turning Insert VNGA331T0420","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1557820 is a ceramic turning insert with ANSI designation VNGA331T0420 and manufacturer grade KY4400. Constructed from an alumina TiCN base material with a PVD-applied TiN coating, this insert is engineered for cutting hard materials where thermal resistance and edge integrity are critical. The V-shape 35-degree diamond geometry with a T-land cutting edge style and flat-top chip breaker delivers controlled chip flow during interrupted and continuous hard-turning operations. With four available cutting edges and negative rake geometry, the insert maximizes tool life and cost efficiency per edge. It is installed by machinists and CNC tooling technicians running precision turning, facing, boring, back turning, and back boring operations.\u003c\/p\u003e\u003cp\u003eThis insert is suited for hard-turning applications in both production and job-shop environments. The KENLOC series designation indicates compatibility with KENNAMETAL KENLOC-style toolholders that accept VNGA-geometry inserts with clamp and pin holding. Typical workpiece materials include hardened steels and other hard-to-machine alloys classified under primary workpiece material code H. Maximum depth of cut is 0.0492 inches (1.25 mm), making this insert appropriate for finishing and light roughing passes on hardened components where dimensional accuracy is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAlumina TiCN ceramic substrate with PVD TiN coating for thermal and wear resistance in hard-material turning\u003c\/li\u003e\n\u003cli\u003e35-degree diamond (rhombic) V-shape with T-land cutting edge for improved edge strength on hard workpieces\u003c\/li\u003e\n\u003cli\u003eFour cutting edges per insert for extended tool life and reduced cost per edge\u003c\/li\u003e\n\u003cli\u003eFlat-top chip breaker geometry for consistent chip control during facing, boring, and back-turning operations\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation compatible with both left- and right-hand toolholder setups\u003c\/li\u003e\n\u003cli\u003eClamp and pin holding method for secure insert retention under high cutting forces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in KENNAMETAL KENLOC-series toolholders accepting VNGA-style inserts with ANSI size code 331 and ISO size code 160404. Holding method requires a toolholder with clamp and pin retention.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert installation and indexing should be performed by a qualified machinist or CNC tooling technician with the machine fully powered down and the spindle locked. Use the appropriate torx or hex key to seat the clamping screw to the toolholder manufacturer's specified torque without applying excessive force that could chip the ceramic edge. Ceramic inserts are brittle compared to carbide; avoid lateral impact during handling and storage. Inspect the seating pocket and pin bore for chips or debris before each insert index to ensure full and accurate seating.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: VNGA331\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: VNGA160404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: VNGA331T0420\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KY4400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Ceramic (Alumina TiCN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\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\u003eCutting Edge Style\u003c\/strong\u003e: T-Land\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: Flat Top\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: 4\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: 0 degrees (Negative Rake)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 16.61 mm (1.3076 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/16 inch (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/64 inch (0.0156 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1500 inches (3.81 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.0492 inches (1.25 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Hard Material (Code H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENLOC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiper Edge\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Radius\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.022 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: 1557820\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51734104736050,"sku":"1557820","price":258.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dba305f442aedfd17a42c52aba64f044.jpg?v=1788760947","url":"https:\/\/voomisupply.com\/products\/kennametal-1557820-ceramic-turning-insert-vnga331t0420","provider":"Voomi Supply","version":"1.0","type":"link"}