Sandvik Coromant 7861278 Turning Insert DNMG441-XM 4425

Product Description

The SANDVIK COROMANT 7861278 is a DNMG-style turning insert from the T-Max P series, designed for external turning operations on CNC lathes and turning centers. It features a 55-degree triangle (D-shape) geometry with a neutral hand orientation and a 0.0156 inch corner radius. The insert is manufactured from solid carbide with a CVD-applied multilayer coating of Al2O3, TiN, and TiCN in the 4425 grade. This combination of substrate and coating targets steel and cast iron workpiece materials, making it a reliable choice for general turning, profiling, and facing passes in production environments.

This insert is suited for medium to roughing turning applications in both production shops and job shops running steel and cast iron components. The XM chip breaker geometry supports stable chip formation across a range of feed rates and depths of cut. The DNMG form factor with clamp and screw holding method fits standard DNMG toolholders commonly found on manual and CNC turning equipment. Licensed machinists, CNC operators, and tooling specialists are the typical end users for this insert type.

Key Features

• DNMG 15 06 04-XM geometry with 55-degree included angle and neutral hand orientation
• CVD multilayer coating: Al2O3, TiN, and TiCN for heat and wear resistance on steel and cast iron
• 4425 grade carbide substrate optimized for primary workpiece material codes P and K
• 0.0156 inch corner radius for moderate finishing and medium roughing work
• 1/2 inch inscribed circle with 1/4 inch insert thickness
• Compatible with clamp and screw insert holding methods on standard DNMG toolholders

Compatibility

Designed for use in standard DNMG-style toolholders accepting the 15 06 04 insert size. Primary workpiece material codes P (steel) and K (cast iron) per ISO turning insert classification. ISO code: DNMG 15 06 04-XM 4425.

Installation Notes

Installation is performed by licensed machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench for clamp screws to avoid cracking the insert or damaging the seat. Inspect the insert pocket and shim seat for wear or debris before seating a new insert, and verify tool offset compensation after each index.