Sandvik Coromant 7860855 Turning Insert DNMG443-QM 4425

Product Description

The SANDVIK COROMANT 7860855 is a DNMG443-QM 4425 indexable turning insert designed for general turning operations on CNC lathes and turning centers. It is manufactured from solid carbide and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal protection during metal removal. The insert has a 55-degree diamond shape, a neutral hand orientation, and a 1.19 mm corner radius. With four cutting edges and a QM chip breaker geometry, it is suited for productive steel and cast iron turning. Machinists and CNC operators install this insert as part of the SANDVIK COROMANT T-Max P tooling system.

This insert is intended for turning operations on steel as its primary workpiece material and cast iron as its secondary workpiece material. The QM chip breaker geometry handles a range of depths of cut and feed rates common in production turning environments. It fits standard DNMG-style insert pockets in T-Max P series toolholders. Both job shop and production floor applications are appropriate, covering roughing to medium finishing passes on ferrous workpieces in industrial machining operations.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for thermal and wear resistance
• 55-degree diamond insert shape with four usable cutting edges
• 1.19 mm corner radius for controlled surface finish and edge strength
• QM chip breaker geometry optimized for steel and cast iron turning
• Neutral hand orientation for flexible toolholder compatibility
• Part of the SANDVIK COROMANT T-Max P series turning system

Compatibility

Designed for use in DNMG-style insert pockets within the SANDVIK COROMANT T-Max P series toolholding system. Compatible with clamp and screw insert holding methods. ISO designation: DNMG 15 06 12-QM 4425.

Installation Notes

CNC machinists and tool crib technicians install indexable turning inserts. Power down and lock out the machine spindle before seating or indexing the insert. Use the correct torx or hex key to the toolholder manufacturer's recommended seating procedure when securing the clamp or screw. Inspect the insert pocket and seating surfaces for chips or debris before installing a fresh cutting edge.