Ingersoll Cutting Tools 6212426 CNMG431 Carbide Turning Insert

Product Description

The INGERSOLL CUTTING TOOLS 6212426 is a CNMG-style indexable carbide turning insert designed for steel turning applications. It carries the ANSI code CNMG431 and ISO code CNMG120404, with an 80-degree diamond (rhombic) insert shape and a neutral hand orientation. The TT8125B grade features a CVD-applied multilayer coating of Al2O3, TiCN, and TiN, delivering high to moderate wear resistance paired with toughness. With four cutting edges and a negative rake and side clearance geometry, this insert is built to handle both roughing and medium machining passes on steel workpieces. Licensed machinists and CNC lathe operators working in production and job shop environments are the primary installers.

This insert is intended for steel turning (ISO material group P) where wear resistance and edge durability are priorities. The chip breaker designation MT supports roughing and medium machining operations, making it suitable for moderate to aggressive depths of cut up to 0.1970 inches. The inscribed circle measures 0.5000 inches, insert thickness is 0.1870 inches, and insert length is 0.5080 inches. It is held in place via a clamp-style toolholder. Typical applications include external and internal diameter turning on CNC lathes and turning centers used in steel component manufacturing.

Key Features

• TT8125B carbide grade with CVD multilayer Al2O3/TiCN/TiN coating for steel turning
• 80-degree diamond (rhombic) insert shape provides strong cutting edge geometry
• MT chip breaker supports roughing and medium machining operations
• Four cutting edges per insert maximize tooling value
• Negative rake and negative side clearance (CNMG geometry) for stable, heavy-duty cuts
• Maximum depth of cut reaches 0.1970 inches for aggressive material removal

Compatibility

Designed for use in CNMG431-compatible clamp-style turning toolholders accepting a 0.5000-inch inscribed circle insert. Verify toolholder pocket geometry, tolerance code M, and clearance code N before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine before indexing or replacing inserts. Use the appropriate torque wrench and clamp hardware specified by the toolholder manufacturer when seating the insert. Inspect the toolholder pocket for wear or debris before installing a new insert to ensure proper seating and runout.