{"product_id":"sandvik-coromant-7859146-turning-insert-35-diamond-coroturn-tr","title":"Sandvik Coromant 7859146 Turning Insert 35 Diamond Coroturn Tr","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 7859146 is a solid carbide turning insert designed for precision external and internal turning operations on CNC lathes and turning centers. Identified by ISO code TR-VB1312-F 4415, this insert features a 35-degree diamond shape with a neutral hand orientation and a 1.19 mm (0.0469 inch) corner radius. The CVD-applied multilayer coating — TiCN, Al2O3, and TiN — delivers strong wear resistance and thermal stability across a range of cutting conditions. The manufacturer grade 4415 positions this insert for both continuous and interrupted cuts, making it a reliable choice for production turning environments where consistent tool life and dimensional accuracy are required.\u003c\/p\u003e\u003cp\u003eThis insert is suited for turning cast iron and ferrous workpiece materials, corresponding to ISO primary material code K and secondary material code P. It is used in lathe toolholders compatible with the CoroTurn TR series, which employs a clamp-and-screw holding method. Typical applications include profile turning, shoulder turning, and finishing passes on medium to small diameter components in job shops, production facilities, and general machining operations. The 8.00 mm inscribed circle and 4.53 mm insert thickness make it appropriate for light-to-medium depth-of-cut scenarios where precise corner geometry is critical.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCVD multilayer coating: TiCN, Al2O3, TiN for extended wear resistance and thermal protection\u003c\/li\u003e\n\u003cli\u003e35-degree diamond insert shape (shape code T) for high-precision profile and contour turning\u003c\/li\u003e\n\u003cli\u003e1.19 mm corner radius provides a balance between edge strength and surface finish quality\u003c\/li\u003e\n\u003cli\u003eNeutral hand orientation for flexible toolholder compatibility\u003c\/li\u003e\n\u003cli\u003eClamp-and-screw holding method for secure, repeatable seating in CoroTurn TR toolholders\u003c\/li\u003e\n\u003cli\u003e5-degree relief angle suited for finishing and light roughing passes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with CoroTurn TR series toolholders that accept TRVB-style inserts with a clamp-and-screw holding method. Insert size code 1312 should be matched to the appropriate toolholder designation when ordering replacement or upgrade inserts.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician with the machine fully powered down and the spindle locked before changing inserts. Use the correct torque wrench and manufacturer-specified clamping hardware when seating the insert to ensure proper contact with the toolholder pocket. Inspect the toolholder pocket for chips or debris before installing the insert, as contamination can cause poor seating and premature edge failure. Never attempt to reseat or adjust the insert while the machine is running.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: TR-VB1312-F 4415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn TR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 4415\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\u003eInsert Shape\u003c\/strong\u003e: Diamond (35 degrees, Shape Code T)\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: 8.00 mm (0.3150 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1.19 mm (0.0469 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 4.53 mm (0.1782 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 5 degrees\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\u003ePrimary Workpiece Material Code\u003c\/strong\u003e: K (Cast Iron)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material Code\u003c\/strong\u003e: P (Steel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 1312\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: 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\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: 7859146\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51750698516786,"sku":"7859146","price":404.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/293b33bf1e851ee623859a7975796f20.jpg?v=1788918640","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7859146-turning-insert-35-diamond-coroturn-tr","provider":"Voomi Supply","version":"1.0","type":"link"}