{"product_id":"widia-4171871-cnma643-carbide-turning-insert-rhombic-80","title":"Widia 4171871 CNMA643 Carbide Turning Insert Rhombic 80","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WIDIA 4171871 is a CNMA643 series carbide turning insert designed for precision metal removal on CNC and manual lathes. It features a multilayer CVD coating  -  TiN, TiCN, and Al2O3 applied via MTCVD process  -  under the manufacturer grade WK20CT. The insert has a rhombic 80-degree shape (C shape code), a neutral hand orientation, and a honed cutting edge style with a flat top chip breaker. With 8 available cutting edges and a 0.0468-inch corner radius, it delivers consistent performance across roughing and finishing passes in ferrous machining applications.\u003c\/p\u003e\n\u003cp\u003eThis insert is primarily suited for cast iron (ISO material code K) and secondarily for steel (ISO material code P), making it a practical choice for job shops and production machining environments where a single insert grade must handle multiple workpiece materials. The neutral hand configuration allows use on both left- and right-hand toolholders. It is installed using a clamp or pin holding method, fitting standard CNMA-style toolholders. The ISO designation for this insert is CNMA190612.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMultilayer CVD coating (TiN, TiCN, Al2O3) via MTCVD process for wear and thermal resistance\u003c\/li\u003e\n  \u003cli\u003eRhombic 80-degree insert shape with 8 cutting edges for extended tool life per insert\u003c\/li\u003e\n  \u003cli\u003eFlat top chip breaker with honed cutting edge for controlled chip formation\u003c\/li\u003e\n  \u003cli\u003eNeutral hand orientation  -  compatible with both left- and right-hand toolholders\u003c\/li\u003e\n  \u003cli\u003ePrimary application in cast iron; secondary use in steel\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI and ISO standards; ISO code CNMA190612\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNMA-series toolholders that accept a 3\/4-inch inscribed circle insert with clamp or pin holding. Compatible with standard ANSI and ISO CNMA190612 toolholder seats.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician with the machine powered down and in a locked-out state. Seat the insert fully in the toolholder pocket and secure using the appropriate clamp or pin per the toolholder manufacturer's instructions. Inspect the seat and clamp for wear or debris before installing a fresh cutting edge. Verify insert orientation and hand before resuming machine operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: CNMA643\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMA190612\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Rhombic 80 (Shape Code C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: WK20CT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN, TiCN, Al2O3 (Multilayer CVD \/ MTCVD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.7616 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 3\/64 inch (0.0468 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2539 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: Flat Top\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: N\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron (Code K)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Steel (Code P)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWiper Edge\u003c\/strong\u003e: No\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: 0.069 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: WIDIA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4171871\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WIDIA","offers":[{"title":"Default Title","offer_id":67907147727154,"sku":"4171871","price":43.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9d6e84a2f95dcbc7f16ed22b2a1b84b6.jpg?v=1791174969","url":"https:\/\/voomisupply.com\/products\/widia-4171871-cnma643-carbide-turning-insert-rhombic-80","provider":"Voomi Supply","version":"1.0","type":"link"}