Sandvik Coromant 7859234 Turning Insert DNMG431-PM 4415

Product Description

The SANDVIK COROMANT 7859234 is a DNMG431-PM 4415 turning insert designed for external turning operations on CNC lathes and turning centers. This indexable carbide insert features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability during continuous and interrupted cuts. The insert has a 55-degree diamond shape, a 0.5000-inch inscribed circle, a 3/16-inch thickness, and a 0.40 mm corner radius. It carries a neutral hand designation and is part of the T-Max P series. Machinists and CNC operators install this insert in compatible toolholders for production turning of steel and cast iron components.

This insert is suited for turning steel (ISO material group P) and cast iron (ISO material group K) in both roughing and finishing applications. The PM chip breaker geometry controls chip formation across a range of depths of cut and feed rates, making it appropriate for medium-duty turning on both manual and CNC turning machines. It is sold individually with a minimum order quantity of 10 units and is intended for professional machine shop use.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for heat and wear resistance
• 55-degree diamond insert shape (Shape Code D) with 4 cutting edges
• PM chip breaker geometry for controlled chip evacuation in steel and cast iron
• 0.40 mm corner radius for medium-finish turning applications
• Clamp and screw insert holding method for secure seating in toolholder
• ISO Code DNMG 15 04 04-PM 4415 for cross-reference and toolholder matching

Compatibility

This insert is compatible with DNMG-style toolholders accepting a 0.5000-inch inscribed circle, 3/16-inch thick diamond insert with clamp or screw holding. Primary workpiece materials are steel (ISO P) and cast iron (ISO K). ISO code DNMG 15 04 04-PM 4415 should be used to verify toolholder fitment. Manufacturers catalog number is DNMG 431-PM 4415.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Before indexing or replacing the insert, the machine must be powered off and the spindle fully stopped. Seat the insert firmly in the toolholder pocket and tighten the clamp or screw to the toolholder manufacturer's specified torque. Inspect the insert seat and clamp for wear or contamination before each insert change to ensure proper clamping and accurate tool geometry.