Ingersoll Cutting Tools 6212912 Cnmg Turning Insert

Product Description

The INGERSOLL CUTTING TOOLS 6212912 is a CNMG-style indexable turning insert engineered for steel machining applications. Built from carbide substrate and finished with a multilayer CVD coating of Al2O3, TiCN, and Titanium Nitride under the TT8125B grade, it delivers wear resistance and thermal stability during continuous and interrupted turning operations. The insert carries a negative rake geometry, a 0-degree relief angle, an 80-degree diamond shape, and a 0.031 inch corner radius. Four cutting edges are available per insert, reducing per-edge tooling cost. The MT chip breaker geometry is optimized for medium turning passes on steel workpieces. Licensed machinists and CNC turning center operators are the primary end users.

This insert is suited for external and internal turning operations on steel workpieces in production CNC turning environments, both light industrial and heavy shop settings. The CNMG format is widely used in 80-degree diamond toolholders for general-purpose turning. The ISO designation for this insert is CNMG120408MT TT8125B, and the insert size code is 432. With a 0.197 inch maximum depth of cut and a 0.508 inch insert length, it is appropriate for medium to moderate material removal rate applications.

Key Features

• CVD multilayer coating: Al2O3, TiCN, and Titanium Nitride for extended tool life on steel
• TT8125B manufacturer grade optimized for primary workpiece material code P (steel)
• Four usable cutting edges per insert for reduced per-edge cost
• MT chip breaker geometry for effective chip control on medium turning passes
• 0-degree relief angle with negative rake for robust edge strength
• Clamp-style insert holding for secure seating in compatible toolholders

Compatibility

Designed for use in CNMG-style 80-degree diamond toolholders that accept a 1/2 inch inscribed circle insert with clamp-style holding. ISO designation CNMG120408MT confirms fitment with toolholders specified for that standard format.

Installation Notes

Installation is performed by a machinist or CNC toolroom technician. Ensure the machine spindle is stopped and all motion is halted before indexing or replacing inserts. Use the correct torque wrench and clamp screw specified by the toolholder manufacturer to secure the insert - do not overtighten or use impact tools on insert clamp screws. Verify insert seating and edge orientation before resuming cutting operations.