Ingersoll Cutting Tools 6121768 Turning Insert CNMG331MM

Product Description

The INGERSOLL CUTTING TOOLS 6121768 is a solid carbide turning insert in the CNMG series, designed for precision metal turning operations on CNC and manual lathes. It carries the TT9225 manufacturer grade and features a three-layer CVD coating of TiCN, Al2O3, and TiCN, which builds wear resistance and thermal stability at the cutting edge. The insert has an 80-degree diamond shape with a neutral hand orientation, a 3/8-inch inscribed circle, and a 1/64-inch corner radius. With four usable cutting edges and a maximum depth of cut of 0.125 inches, it delivers consistent performance across high-demand turning applications.

This insert is engineered for turning stainless steel, super-alloys, and titanium - workpiece material codes M and S - making it a practical choice for aerospace, medical, and industrial component machining. The MM chip breaker geometry is suited for medium machining conditions where controlled chip formation is critical. It installs via clamp-style insert holding and is compatible with CNMG-style insert pockets. The ISO code is CNMG090404MM TT9225 and the ANSI code is CNMG331MMTT9225, which aids cross-referencing with toolholder catalogs and procurement systems.

Key Features

• TT9225 grade with CVD-applied TiCN, Al2O3, TiCN multilayer coating for wear and heat resistance
• 80-degree diamond insert shape with negative rake and 0-degree clearance angle
• MM chip breaker geometry optimized for medium turning of difficult-to-machine alloys
• Four cutting edges per insert for extended tool life and lower cost per edge
• Maximum depth of cut of 0.125 inches with a 1/64-inch corner radius for controlled finishing and semi-finishing passes
• ISO-standard geometry for broad toolholder compatibility

Compatibility

Designed for use in CNMG-style clamp-type toolholders that accept a 3/8-inch inscribed circle, 3/16-inch thick diamond insert. Intended for turning stainless steel, super-alloys, and titanium workpieces (ISO material codes M and S).

Installation Notes

Installation is performed by a machinist or tooling technician following the toolholder manufacturer's clamping torque and seating procedures. Always index or replace the insert with the machine fully stopped and the spindle locked. Inspect the insert pocket and clamping hardware for wear or contamination before seating a new edge. Confirm the insert is fully seated and the clamp is secure before resuming cutting operations.