{"product_id":"sandvik-coromant-7859155-turning-insert-cnmm544-qr-4415","title":"Sandvik Coromant 7859155 Turning Insert CNMM544-QR 4415","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7859155 is a CNMM-style indexable turning insert in the T-Max P series, designed for external and internal turning operations on CNC lathes and turning centers. It features an 80-degree diamond (rhombic) insert shape with a neutral hand orientation and a 1\/16-inch corner radius (0.0625 inches). The substrate is solid carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, corresponding to manufacturer grade 4415. This combination delivers wear resistance and thermal stability suited for medium to rough turning passes. Licensed machinists and CNC operators install this insert in compatible tool holders as a direct indexable replacement.\u003c\/p\u003e\u003cp\u003eThis insert is rated for primary use on steel workpieces (ISO material group P) and secondary use on cast iron (ISO material group K), making it well suited for production turning in general machining, job shops, and heavy manufacturing environments. The QR chip breaker geometry is intended for medium to roughing cuts where chip control and edge strength are priorities. Each insert provides 2 cutting edges, and the insert is held by clamp or screw depending on the toolholder setup.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for thermal and abrasion resistance\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape (Shape Code C) for versatile turning access\u003c\/li\u003e\n\u003cli\u003eQR chip breaker geometry optimized for medium to rough turning applications\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation compatible with neutral-hand toolholders\u003c\/li\u003e\n\u003cli\u003e2 usable cutting edges per insert to extend tooling value\u003c\/li\u003e\n\u003cli\u003eClamp or screw holding method for secure seating in CNMM-compatible holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNMM-style toolholders accepting a 1\/4-inch inscribed circle insert with a 0-degree relief angle (Clearance Code N) and tolerance code M. ISO code CNMM 16 06 16-QR 4415. Compatible holders must support clamp or screw retention. Verify toolholder specifications before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed by qualified machinists or CNC tooling technicians. Power down and lock out the machine before changing inserts. Seat the insert fully and evenly in the pocket before tightening the clamp or screw to the toolholder manufacturer's specified torque. Inspect the insert pocket and seating surface for chips or debris that could cause improper seating or edge breakage during cutting.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CNMM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (80 degrees)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape Code\u003c\/strong\u003e: C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4415\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, TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: QR\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: 0.2500 inches (15.88 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0625 inches (1.59 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.2500 inches (6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees (Clearance Code N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (ISO Code P)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Cast Iron (ISO Code K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMM 16 06 16-QR 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: T-Max P\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: 0.5 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: SANDVIK COROMANT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7859155\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51731717095730,"sku":"7859155","price":429.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/13148e8da32f994cfd299f4b54a7051a.jpg?v=1788734215","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859155-turning-insert-cnmm544-qr-4415","provider":"Voomi Supply","version":"1.0","type":"link"}