{"product_id":"kennametal-1181990-ceramic-turning-insert-80-diamond","title":"Kennametal 1181990 Ceramic Turning Insert 80 Diamond","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 1181990 is a ceramic turning insert in the KENLOC series, manufactured to ANSI insert code CNGA433 and ISO code CNGA120412. It is an uncoated silicon nitride ceramic insert with an 80-degree diamond (rhombic) shape, designed for high-speed machining of cast iron workpieces. The insert features a T-Land cutting edge style, a flat top chip breaker, and a negative rake angle with zero relief angle. With a 0.5-inch inscribed circle and a 3\/64-inch corner radius, it suits precision turning, facing, and boring operations. This insert is installed by machinists and CNC operators in production turning environments where cast iron is the primary workpiece material.\u003c\/p\u003e\n\u003cp\u003eThe KENNAMETAL 1181990 is used in turning, facing, and boring applications on cast iron components in both production and job-shop environments. The KY3500 grade delivers high wear resistance to moderate wear resistance and toughness, making it well suited for demanding cast iron machining cycles. It fits KENLOC-style toolholders that accept CNGA-geometry inserts and is held in place by a clamp and pin insert-holding method. This insert is intended for use on CNC lathes and turning centers where consistent tool life and surface finish on cast iron are required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSilicon nitride ceramic substrate, grade KY3500, optimized for cast iron machining\u003c\/li\u003e\n  \u003cli\u003e80-degree diamond (rhombic) insert shape with T-Land cutting edge style for wear resistance\u003c\/li\u003e\n  \u003cli\u003eFlat top chip breaker with negative rake and zero relief angle for stable cutting\u003c\/li\u003e\n  \u003cli\u003eFour cutting edges per insert for extended tool life per unit\u003c\/li\u003e\n  \u003cli\u003eUncoated bright finish — no coating process applied, preserving ceramic edge integrity\u003c\/li\u003e\n  \u003cli\u003eCompatible with ANSI and ISO standardized tooling systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard insert for KENLOC-series toolholders accepting CNGA-geometry inserts. Multi-use application includes turning, facing, and boring operations. Industry standard number CNGA433T0820 confirms fitment in any CNGA433-compatible insert pocket using a clamp and pin holding method.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a qualified machinist or CNC tooling technician. The machine spindle must be fully stopped and all axis motion locked before indexing or replacing inserts. Use appropriate insert seating tools and inspect the pocket seat for chips or debris before seating the insert. Clamp torque should follow the toolholder manufacturer specifications for KENLOC-style clamp and pin systems — do not overtighten, as ceramic inserts are brittle and sensitive to mechanical shock.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: CNGA433\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: CNGA120412\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: CNGA433T0820\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KY3500\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Silicon Nitride Ceramic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated (Bright)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: C - Diamond (Rhombic) 80 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 80 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5 inches (1\/2 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 12.9 mm (0.5077 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inches (3\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0469 inches (3\/64 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2031 inches\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\u003eRake Angle\u003c\/strong\u003e: 0 degrees (Negative Rake)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Negative\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\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron\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\u003eWeight\u003c\/strong\u003e: 0.0075 pounds\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\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: 1181990\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51749482332466,"sku":"1181990","price":226.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ccf2b844781ba7a31cd9a95cf5fdbf1f.jpg?v=1788906647","url":"https:\/\/voomisupply.com\/products\/kennametal-1181990-ceramic-turning-insert-80-diamond","provider":"Voomi Supply","version":"1.0","type":"link"}