{"product_id":"sandvik-coromant-7860849-turning-insert-cnmg644-qm-4425","title":"Sandvik Coromant 7860849 Turning Insert CNMG644-QM 4425","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7860849 is a CNMG-style indexable turning insert designed for external and internal turning operations on CNC lathes and turning centers. Part of the T-Max P series, this insert carries the 4425 grade designation — a CVD multilayer coating of TiCN, Al2O3, and TiN applied over a solid carbide substrate. That coating stack delivers high wear resistance while retaining sufficient toughness for both roughing and medium machining passes. The 80-degree diamond (rhombic) insert shape and neutral hand orientation make it well suited for straight turning and facing. It features a QM chip breaker geometry engineered to handle the chip loads typical in steel and cast iron applications.\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for use in metalworking environments where the primary workpiece material is steel (ISO P) and the secondary material is cast iron (ISO K). The QM chip breaker geometry handles roughing and medium machining operations, making it appropriate for production turning on mid-to-large diameter workpieces. It seats in toolholders that accept CNMG-style inserts using clamp or screw holding methods. The negative side clearance (N clearance code, M tolerance code) is standard for double-sided insert seating and high-load cutting. Machinists in job shops, aerospace component manufacturing, and general metalworking will find this insert applicable to a wide range of shaft, flange, and bore-facing operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for high wear resistance in steel and cast iron turning\u003c\/li\u003e\n  \u003cli\u003e80-degree diamond (rhombic) insert shape with neutral hand for straight turning and facing operations\u003c\/li\u003e\n  \u003cli\u003eQM chip breaker geometry rated for roughing and medium machining pass depths\u003c\/li\u003e\n  \u003cli\u003e4 cutting edges per insert — reduces per-edge tooling cost in high-volume production\u003c\/li\u003e\n  \u003cli\u003eNegative side clearance (N) with M tolerance for secure double-sided clamping or screw retention\u003c\/li\u003e\n  \u003cli\u003eISO code CNMG 19 06 16-QM 4425 for cross-reference with standard toolholder catalogs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNMG-style indexable turning toolholders that accept clamp or screw holding methods with a negative-clearance insert seat. Compatible with toolholders specified for the ISO size code 190616 insert format.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully against the pocket locating surfaces before tightening the clamp or retention screw — partial seating causes premature edge failure and runout error. Inspect the insert pocket and shim seat for chips or wear before installing a fresh cutting edge.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CNMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: T-Max P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4425\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 Layers\u003c\/strong\u003e: TiCN, Al2O3, TiN\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\u003eChip Breaker\u003c\/strong\u003e: QM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker Operation\u003c\/strong\u003e: Roughing, Medium Machining\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/4 inch (0.7500 inches \/ 19.05 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/16 inch (0.0625 inches \/ 1.59 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/4 inch (0.2500 inches \/ 6.35 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.3120 inches (7.93 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 80 degrees\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 (Negative)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\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, Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (ISO P)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Cast Iron (ISO K)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMG 19 06 16-QM 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Size Code\u003c\/strong\u003e: 190616\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 5.08 inches L x 2.13 inches W x 0.53 inches H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.07 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 insert per package\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7860849\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51737856016690,"sku":"7860849","price":600.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/65bb728d6d066f2f54d40a11e690c4ba_bc647c50-a444-40a2-978a-489f30665ba5.jpg?v=1788794446","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7860849-turning-insert-cnmg644-qm-4425","provider":"Voomi Supply","version":"1.0","type":"link"}