Sandvik Coromant 7860512 Turning Insert Vbmt 35 Diamond

Product Description

The SANDVIK COROMANT 7860512 is a VBMT-style solid carbide turning insert from the CoroTurn 107 series, designed for external turning operations on CNC and manual lathes. This insert features a 35-degree diamond shape (V) with a 0.4 mm (0.0156 inch) corner radius and a 1/4 inch (0.250 inch) inscribed circle. It is manufactured to grade 4415 and coated via CVD with a multilayer Al2O3, TiCN, and TiN stack for extended wear resistance and thermal protection. The UF chip breaker geometry is optimized for light finishing cuts. The insert is neutral hand and accepts both clamp and screw mounting methods. Licensed machinists and CNC operators install this insert in precision turning applications.

The 7860512 is suited for finishing and semi-finishing passes on steel and cast iron workpieces. The UF chip breaker geometry promotes tight chip control at lower depths of cut and feed rates, making it appropriate for close-tolerance OD turning on production and job-shop lathes. Primary workpiece material is steel (ISO code P) and secondary workpiece material is cast iron (ISO code K). The CoroTurn 107 series is a common platform in both high-volume production and maintenance turning environments.

Key Features

• 35-degree diamond insert shape (V) with 5-degree relief angle for clearance in finishing passes
• CVD multilayer coating: Al2O3, TiCN, and TiN for heat resistance and crater wear protection
• 0.4 mm corner radius suits fine-finish turning with controlled surface finish requirements
• UF chip breaker optimized for light cuts on steel and cast iron
• Neutral hand orientation; compatible with clamp and screw insert holding methods
• 2 usable cutting edges per insert

Compatibility

Designed for use in CoroTurn 107 series toolholders that accept VBMT 11 02 04 inserts. ISO code VBMT 11 02 04-UF 4415. Industry standard number VBMT 11 02 04-UF 4415. Clearance code B, tolerance code M.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before seating or changing inserts. Ensure the insert pocket and clamping surfaces are clean and free of chips before seating the insert. Follow the toolholder manufacturer torque guidelines for the clamping screw; do not overtighten, as this can fracture the carbide substrate.