Ingersoll Cutting Tools 6212640 Turning Insert TCMT731MT

Product Description

The INGERSOLL CUTTING TOOLS 6212640 is a TCMT731MT TT8125B grade carbide turning insert designed for steel turning applications on CNC lathes and turning centers. This triangular insert features a CVD-applied multilayer coating of Al2O3 and TiCN for wear resistance and thermal stability at the cutting edge. It carries a 60-degree included angle, a 0.0160-inch corner radius, and a 0.3790-inch insert length, making it suited for light-to-moderate depth-of-cut finishing and semi-finishing passes. The neutral hand orientation and positive rake geometry support consistent chip flow. Licensed machinists and CNC turning technicians are the primary installers of this insert.

This insert is intended for use on steel workpieces, classified under ISO material group P. It fits standard TCMT-style toolholders using a screw-clamp holding method. The MT chip breaker geometry is designed to manage chip control during moderate feed rates on low-to-medium carbon steels, alloy steels, and similar ferrous materials. Typical applications include OD turning, facing, and light profiling operations where consistent surface finish and dimensional accuracy are required. The three available cutting edges extend tooling economy per insert.

Key Features

• CVD-applied Al2O3 and TiCN multilayer coating for thermal and abrasion resistance
• TT8125B manufacturer grade optimized for steel (ISO P) turning
• 60-degree triangle shape with positive rake for reduced cutting forces
• MT chip breaker geometry for controlled chip formation during steel turning
• Three cutting edges per insert for extended tooling value
• Screw-clamp holding method for secure, repeatable seating in TCMT toolholders

Compatibility

Designed as a direct-fit replacement for TCMT-style screw-clamp turning toolholders accepting a 731 insert size, ISO code TCMT090204MT TT8125B, within the TCMT series.

Installation Notes

This insert is installed by a qualified machinist or CNC tooling technician. Before indexing or replacing inserts, power down and lock out the machine spindle per facility lockout/tagout procedures. Use the appropriate Torx or hex key at the manufacturer-specified torque range for TCMT screw-clamp seats - consult the toolholder documentation for seating torque, as no torque value is provided in this product data. Inspect the insert pocket and clamp screw for debris or damage before seating a new insert.