{"product_id":"sumitomo-192r291-turning-insert-vnma331-ac415k-carbide","title":"Sumitomo 192R291 Turning Insert VNMA331 AC415K Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SUMITOMO 192R291 is a solid carbide turning insert in the VNMA style, designed for precision metal-cutting operations on CNC and manual lathes. It carries the manufacturer grade AC415K with a CVD-applied coating and a proprietary FF finish that enhances wear resistance and thermal stability during interrupted and continuous cuts. The insert features a 35-degree diamond shape with a negative rake angle and a 0-degree relief (clearance code N), making it well suited for general turning where tool security and edge strength are the priority. The corner radius measures 0.0156 inches (1\/64 inch) and the inscribed circle is 0.375 inches (3\/8 inch).\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for turning applications where cast iron and similar K-category workpiece materials are machined. It is held in the tool holder by a clamp-and-pin method, which provides rigid clamping under the high cutting forces typical in ferrous-metal turning. The A-style chip breaker geometry assists in chip control across moderate feed and depth-of-cut ranges common in production turning environments. Machinists and CNC operators working in job shops, production cells, and maintenance machining will find this insert suitable for facing, OD turning, and shoulder work within its designed cutting parameters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide substrate with CVD coating and AC415K grade for extended tool life in K-category materials\u003c\/li\u003e\n  \u003cli\u003e35-degree diamond (V) insert shape with negative rake for strong cutting edge\u003c\/li\u003e\n  \u003cli\u003eA-style chip breaker geometry for controlled chip formation at moderate feeds\u003c\/li\u003e\n  \u003cli\u003eClamp and pin holding method for secure, repeatable seating in VNMA-style tool holders\u003c\/li\u003e\n  \u003cli\u003eTolerance code M and clearance code N per ANSI and ISO 13399 standards for consistent dimensional accuracy\u003c\/li\u003e\n  \u003cli\u003eCVD proprietary FF coating process for enhanced thermal and abrasion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in VNMA-style insert pockets that accept a 3\/8-inch inscribed circle, 3\/16-inch thick turning insert with a clamp-and-pin holding method; compatible tool holders must conform to ANSI VNMA331 and ISO VNMA160404 insert seat specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInsert seating and indexing should be performed by a qualified machinist or CNC operator with the machine fully powered down and the spindle locked before handling cutting edges. Ensure the insert pocket and clamp components are clean and free of chips before seating the insert to achieve proper contact and clamping force. Use the correct torque for the clamp screw as specified by the tool holder manufacturer — do not overtighten, as this can fracture the carbide substrate. Inspect the insert edge condition at regular intervals and index or replace before catastrophic edge failure occurs.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: VNMA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANSI Code\u003c\/strong\u003e: VNMA331\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: VNMA160404\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (V), 35-degree included angle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: AC415K\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Designation\u003c\/strong\u003e: FF\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\u003eChip Breaker\u003c\/strong\u003e: A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.375 inches (3\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.6535 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inches (3\/16 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\u003eHole Diameter\u003c\/strong\u003e: 0.150 inches\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\u003eSecondary Workpiece Material\u003c\/strong\u003e: Cast Iron (K)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO 13399\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.028 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.5 inches L x 1.5 inches W x 0.44 inches H\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: SUMITOMO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 192R291\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51732557136178,"sku":"192R291","price":234.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8458f61aa7dba588df9257006cff086e.jpg?v=1788744425","url":"https:\/\/voomisupply.com\/products\/sumitomo-192r291-turning-insert-vnma331-ac415k-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}