{"product_id":"sandvik-coromant-7861078-turning-insert-tcmt-triangle","title":"Sandvik Coromant 7861078 Turning Insert Tcmt Triangle","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 7861078 is a TCMT-style solid carbide turning insert from the CoroTurn 107 series. It features a triangular shape with a 60-degree included angle, a 1\/4 inch (0.2500 inch) inscribed circle, and a 1.19 mm (0.0469 inch) corner radius. The insert carries a CVD-applied multilayer coating of Al2O3, TiN, and TiCN over a 4425 carbide grade substrate, making it well suited for steel and cast iron turning operations. With 3 cutting edges, a neutral hand orientation, and compatibility with both clamp and screw holding methods, this insert is designed for reliable, repeatable performance on CNC lathes and turning centers operated by machinists and tooling professionals.\u003c\/p\u003e\n\u003cp\u003eThe 7861078 is intended for external and internal turning applications where a TCMT-style insert is specified. Its primary workpiece material designation is steel (ISO P), with cast iron (ISO K) as a secondary application. The PR chip breaker geometry handles general-purpose steel turning at moderate cutting parameters. This insert fits toolholders designed for TCMT 11 03 12 inserts (ISO code TCMT 11 03 12-PR 4425, industry standard TCMT110312PR4425). It is sold individually with a minimum order quantity of 10 inserts per order.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: Al2O3, TiN, and TiCN for wear resistance and thermal protection\u003c\/li\u003e\n  \u003cli\u003e4425 carbide grade optimized for steel and cast iron turning\u003c\/li\u003e\n  \u003cli\u003eTriangular insert shape with 60-degree included angle and 7-degree relief angle\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch inscribed circle with 1.19 mm corner radius for consistent edge geometry\u003c\/li\u003e\n  \u003cli\u003e3 usable cutting edges per insert for extended tooling economy\u003c\/li\u003e\n  \u003cli\u003ePR chip breaker geometry suited to general-purpose steel turning\u003c\/li\u003e\n  \u003cli\u003eCompatible with both clamp and screw insert holding methods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for toolholders accepting TCMT 11 03 12 inserts per ISO and industry standard TCMT110312PR4425. Verify toolholder pocket geometry, clearance code C, and tolerance code M before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or tooling technicians. Power down and de-energize the machine spindle before seating or removing inserts. Use the correct torque wrench and insert screw driver per the toolholder manufacturer specifications when using screw-lock holders. Inspect the insert pocket for chips or debris before seating a new insert to ensure proper contact and edge alignment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: TCMT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Triangle (60-degree included angle)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape Code\u003c\/strong\u003e: T\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\u003c\/strong\u003e: Al2O3, TiN, TiCN (CVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: PR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 1\/4 inch (0.2500 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1.19 mm (0.0469 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/8 inch (0.1250 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1102 inch (2.80 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: C\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: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\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: TCMT 11 03 12-PR 4425\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.74 x 1.54 x 0.44 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.44 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\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: 7861078\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51736746131762,"sku":"7861078","price":233.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/45c5cb2a1768846c4297739fb0263c1a_e7e8a1a2-cd26-4f22-bfca-9cbdf82f8c6d.jpg?v=1788779795","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-7861078-turning-insert-tcmt-triangle","provider":"Voomi Supply","version":"1.0","type":"link"}