Sandvik Coromant 7861071 Turning Insert TCMT32.53-PM 4425

Product Description

The SANDVIK COROMANT 7861071 is a solid carbide turning insert carrying the ANSI designation TCMT32.53-PM 4425, part of the CoroTurn 107 series. It features a triangular (60-degree included angle) geometry with a neutral hand orientation and a 1.19 mm (0.0469 inch) corner radius. The insert is CVD-coated with Al2O3, TiN, and TiCN layers, delivering high wear resistance suited for steel and cast iron machining. With three usable cutting edges and a positive side clearance, it is engineered for roughing and medium machining passes in production turning applications. Licensed machinists and CNC lathe operators install this insert in compatible CoroTurn 107 toolholders.

This insert is designed for primary use on steel workpieces (ISO material code P) and secondary use on cast iron (ISO material code K). The PM chip breaker geometry targets roughing and medium machining operations where chip control and edge durability under interrupted or continuous cuts are critical. Typical applications include external and internal profile turning in job-shop and production environments running CNC lathes or manual turret lathes. The 3/8-inch inscribed circle and 5/32-inch thickness place it in a mid-range insert size appropriate for moderate-depth-of-cut operations.

Key Features

• CVD multilayer coating: Al2O3, TiN, TiCN for extended tool life on steel and cast iron
• PM chip breaker optimized for roughing and medium machining operations
• 3 usable cutting edges per insert for cost-effective tooling management
• Neutral hand orientation fits left-hand and right-hand toolholder setups
• Positive side clearance (clearance code C) reduces cutting forces and heat buildup
• Compatible with both clamp and screw insert-holding methods

Compatibility

Designed for use with CoroTurn 107 series toolholders accepting TCMT-style inserts with a 3/8-inch inscribed circle. ISO insert code is TCMT 16 T3 12-PM 4425. Refer to SANDVIK COROMANT CoroTurn 107 toolholder selection charts to confirm shank size and pocket geometry compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the manufacturer-specified torque wrench and Torx key when tightening the clamping screw to avoid cracking the carbide substrate. Inspect the insert pocket and clamping components for wear or debris before seating a new insert.