Sandvik Coromant 7231380 Turning Insert DNMG432-MM 2220

Product Description

The SANDVIK COROMANT 7231380 is a DNMG-style turning insert designed for general turning operations on CNC lathes and turning centers. It belongs to the T-Max P series and carries manufacturer grade 2220, a CVD-applied multilayer coating of TiCN, Al2O3, and TiN engineered for wear resistance and thermal stability. The insert features a 55-degree diamond shape with a neutral hand orientation, a 0.5000-inch inscribed circle, and a 0.0313-inch (1/32 inch) corner radius. The MM chip breaker geometry is optimized for controlled chip formation. Machinists and CNC operators install this insert in compatible toolholders for finishing and semi-finishing passes.

This insert is rated for primary use on stainless steel (ISO material code M), making it suitable for turning austenitic, ferritic, and duplex stainless alloys in aerospace, food processing, and general manufacturing applications. Its four cutting edges maximize cost-per-edge efficiency in production environments. The DNMG insert style uses both clamp and pin holding methods, providing secure seating under interrupted and continuous cutting conditions common in medium-duty turning setups.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance on stainless steel
• MM chip breaker geometry for reliable chip control in semi-finishing and finishing cuts
• Four usable cutting edges for reduced tooling cost per edge
• Neutral hand orientation fits a wide range of standard DNMG toolholders
• Grade 2220 optimized for ISO M (stainless steel) primary workpiece material
• Clamp and pin holding method for secure insert retention under variable cutting loads

Compatibility

Designed for use in toolholders accepting DNMG 432 style inserts with clamp and pin holding. Verify toolholder bore and clamp style before installation. ISO designation: DNMG 15 04 08-MM 2220.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench or screwdriver specified by the toolholder manufacturer for the clamping pin or screw — do not over-tighten or use impact tools on insert hardware. Inspect the insert pocket and seating surface for chips or debris before seating the new insert to ensure proper contact and dimensional accuracy.