Sandvik Coromant 7860707 Turning Insert DNMG431-PM 4425

Product Description

The SANDVIK COROMANT 7860707 is a DNMG431-PM 4425 series 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 protection during high-speed steel cutting. The insert carries a 0.40 mm corner radius, a 55-degree diamond shape, and a neutral hand orientation. With four cutting edges per insert, it delivers consistent performance across multiple index positions. Installed by machinists and CNC operators in production turning environments, it fits standard DNMG toolholders using clamp or screw holding methods.

This insert is engineered primarily for turning steel (ISO material group P) and cast iron (ISO material group K) in medium to finish machining applications. The PM chip breaker geometry is suited for stable, continuous cuts where chip control and surface finish are priorities. The T-Max P series is a standard Sandvik Coromant platform widely used in production shops running general-purpose turning operations on ferrous workpiece materials. It is sold individually but subject to a minimum order quantity of 10 units per order.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance on steel and cast iron
• 55-degree diamond insert shape with four indexable cutting edges
• 0.40 mm (0.0156 inch) corner radius for medium to finish turning passes
• PM chip breaker geometry for controlled chip formation in continuous cuts
• Neutral hand orientation compatible with standard DNMG clamp and screw toolholders
• ISO code DNMG 15 04 04-PM 4425 for cross-reference with toolholder catalogs

Compatibility

Designed for use in standard DNMG-style toolholders accepting a 1/2 inch (12.70 mm) inscribed circle insert. Compatible with clamp and screw holding methods. Primary workpiece materials are steel (ISO P) and cast iron (ISO K). ISO code DNMG 15 04 04-PM 4425 can be used to verify toolholder seat compatibility.

Installation Notes

Indexable turning inserts are installed and indexed by machinists or CNC setup technicians. Power down and lock out the spindle before seating or indexing the insert. Ensure the insert pocket and seating surfaces are clean and free of chips before installation. Follow the toolholder manufacturer torque guidance for the clamping screw to avoid insert movement or seat damage during cutting.