Ingersoll Cutting Tools 6212585 Cnmg Turning Insert TT8125B

Product Description

The INGERSOLL CUTTING TOOLS 6212585 is a CNMG-style indexable turning insert designed for external and internal turning operations on steel workpieces. Built from carbide substrate in a diamond (80-degree included angle) shape, this insert carries the TT8125B manufacturer grade and a CVD-applied multilayer coating of Al2O3, TiCN, and Titanium Nitride for elevated heat resistance and wear life. The FC chip breaker geometry controls chip flow at moderate depths of cut up to 0.059 inches. With four usable cutting edges and a neutral hand orientation, it suits a wide range of CNC lathe and turning center applications. Licensed machinists and CNC operators install this insert as a precision-grade consumable in production turning environments.

This insert is intended for primary use on steel (ISO material code P) in production and job-shop turning applications. It fits standard CNMG toolholders with a clamp-style holding method. The 0.031-inch corner radius and FC chip breaker combination make it well suited for medium finishing and semi-finishing passes where chip control and surface finish are both critical. The ISO designation for this insert is CNMG120408FC TT8125B, which aligns it with common international toolholder systems used on CNC lathes, turning centers, and multi-axis machining equipment.

Key Features

• CNMG insert style with 80-degree diamond shape and negative rake for strong cutting edge support
• CVD multilayer coating: Al2O3, TiCN, and Titanium Nitride for thermal resistance and extended tool life on steel
• TT8125B grade optimized for steel (ISO P) turning applications
• FC chip breaker geometry for effective chip control in medium finishing and semi-finishing cuts
• Four cutting edges per insert for maximized cost-per-edge value
• 0.031-inch corner radius with maximum depth of cut of 0.059 inches

Compatibility

Designed as a replacement-style CNMG432 indexable insert compatible with standard CNMG clamp-style toolholders using a 0.500-inch inscribed circle. ISO designation CNMG120408FC TT8125B confirms fitment in toolholder systems referencing that standard geometry.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully and evenly against the toolholder pocket before torquing the clamp screw; an uneven seat can cause premature edge failure or dimensional inaccuracy. Inspect the toolholder pocket for chips or debris before installing a new insert.