{"product_id":"sandvik-coromant-7859185-turning-insert-dnmg442-qm-4415","title":"Sandvik Coromant 7859185 Turning Insert DNMG442-QM 4415","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7859185 is a DNMG442-QM 4415 indexable turning insert designed for metal-cutting lathe operations in production and job-shop environments. It features a solid carbide substrate with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, a combination that provides wear resistance, thermal shielding, and reduced built-up edge when turning steel and cast iron. The insert has a 55-degree diamond shape, a 0.5000-inch inscribed circle, and a 0.79 mm corner radius. The QM chip breaker geometry is engineered for medium to rough turning passes where chip control and cutting-edge stability are critical. Installation is performed by machinists and CNC operators in machine shops and manufacturing facilities.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for external and internal turning operations on steel (ISO P) as primary workpiece material and cast iron (ISO K) as secondary workpiece material. It fits into compatible T-Max P series toolholders that accept DNMG-style inserts with clamp and screw holding. With four cutting edges per insert, it offers multiple indexes before replacement, making it a cost-effective choice for high-volume turning programs. It is appropriate for both CNC turning centers and manual engine lathes running moderate to heavy depths of cut.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: TiCN, Al2O3, and TiN for wear and thermal resistance\u003c\/li\u003e\n  \u003cli\u003e55-degree diamond insert shape (D) with neutral hand orientation\u003c\/li\u003e\n  \u003cli\u003eQM chip breaker geometry optimized for medium to rough steel turning\u003c\/li\u003e\n  \u003cli\u003eFour usable cutting edges per insert for extended tool life per piece\u003c\/li\u003e\n  \u003cli\u003eClamp and screw insert holding for secure seating under interrupted or heavy cuts\u003c\/li\u003e\n  \u003cli\u003eISO grade 4415 carbide substrate balanced for P and K workpiece material groups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in T-Max P series toolholders accepting DNMG-style inserts with clamp or screw clamping. ISO code reference: DNMG 15 06 08-QM 4415. Compatible with toolholder systems requiring a 0.5000-inch (12.70 mm) inscribed circle DNMG insert with a 0.2030-inch hole diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInsert indexing and replacement is performed by a machinist or CNC operator with the machine fully stopped and the spindle locked out per facility lockout\/tagout procedures. Use the appropriate Torx or hex key specified by the toolholder manufacturer when tightening the clamp or screw — do not overtighten, as carbide inserts are brittle and can crack under excessive clamping force. Inspect the toolholder pocket seat for chips or debris before seating a new insert. Verify insert orientation matches the neutral-hand designation of the toolholder before resuming cuts.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: DNMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: DNMG 15 06 08-QM 4415\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond (55 degrees included angle)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\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 (CVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: QM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 1\/2 inch (0.5000 inch \/ 12.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.79 mm (0.0313 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/4 inch (0.2500 inch \/ 6.35 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2030 inch (5.16 mm)\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 Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle (Clearance Code N)\u003c\/strong\u003e: 0 degrees\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: 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\u003eSeries\u003c\/strong\u003e: T-Max P\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: 0.03 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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7859185\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51753763209522,"sku":"7859185","price":352.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ca985a21bd453479683c87ec646700c5_f2d6b6c3-4e28-45d5-a522-d6f8ab3a17c6.jpg?v=1788940419","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859185-turning-insert-dnmg442-qm-4415","provider":"Voomi Supply","version":"1.0","type":"link"}