Sandvik Coromant 7231327 Turning Insert CNMG432-MR 2220

Product Description

The SANDVIK COROMANT 7231327 is a CNMG432-MR 2220 series turning insert engineered for precision metal cutting in CNC lathe and turning center applications. Part of the T-Max P series, this insert is manufactured from carbide substrate and finished with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN. It features a 0.5 inch inscribed circle, a 1/32 inch corner radius, and an 80-degree diamond shape that delivers a strong cutting edge with consistent chip control. The MR chip breaker geometry is optimized for stainless steel, making this insert a reliable choice for machinists working with difficult-to-cut ISO M materials in finishing and semi-finishing operations.

This insert is suited for turning operations on stainless steel workpieces in both production shop and job shop environments. The neutral hand orientation allows flexible tool holder mounting. The T-Max P series is a widely used platform for external turning, and the CNMG insert style with clamp and pin holding method fits standard CNMG-compatible tool holders. Primary workpiece material classification is ISO M, covering austenitic and duplex stainless steels. With 4 available cutting edges per insert, this grade delivers consistent performance across multiple indexing cycles.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal stability on stainless steel
• MR chip breaker geometry designed for ISO M stainless steel turning
• 80-degree diamond insert shape with 4 cutting edges for extended tool life per insert
• 1/32 inch corner radius suitable for semi-finishing and finishing passes
• Clamp and pin holding method for secure seating in compatible tool holders
• Neutral hand insert for versatile right- or left-hand tool holder compatibility

Compatibility

Designed as an OEM-style replacement or direct-use insert for CNMG-style tool holders accepting a 432 insert size with clamp and pin holding. ISO code CNMG 12 04 08-MR 2220 cross-references standard CNMG holder pockets in the T-Max P series platform.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Before indexing or replacing the insert, ensure the machine spindle is fully stopped and all axis motion is locked out per shop safety procedures. Seat the insert firmly in the pocket and torque the clamp screw according to the tool holder manufacturer specifications. Inspect the insert pocket and seating surface for chips or debris before securing the new insert to maintain accurate tool nose positioning.