Sandvik Coromant 7860791 Turning Insert CNMG432-PF 4425

Product Description

The SANDVIK COROMANT 7860791 is a CNMG432-PF 4425 indexable turning insert from the T-Max P series, designed for external and internal turning operations on CNC lathes and turning centers. The insert is manufactured from solid carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which delivers wear resistance and thermal stability during continuous and interrupted cuts. The 80-degree diamond (C) insert shape provides a strong cutting edge geometry. With a 0.5-inch inscribed circle and a 0.79 mm corner radius, this insert is sized for medium-duty material removal applications. It is installed by qualified machinists and toolroom technicians.

This insert is suited for turning steel and cast iron workpieces in production and job-shop environments. The PF chip breaker geometry is optimized for finishing and semi-finishing passes on steel, helping control chip flow at moderate feed rates and depths of cut. The neutral hand configuration allows use in standard CNMG-style toolholders. Applications include shaft turning, facing, and profiling on both ferrous and ductile cast iron components in general machining and automotive part production.

Key Features

• CVD multilayer coating: TiCN, Al2O3, TiN for extended tool life on steel and cast iron
• 80-degree diamond insert shape (CNMG) with 4 usable cutting edges
• PF chip breaker geometry optimized for finishing and semi-finishing on steel
• 0.79 mm corner radius for surface finish control and edge strength balance
• Neutral hand orientation compatible with standard CNMG clamp and screw toolholders
• ISO code CNMG 12 04 08-PF 4425 for cross-reference and toolholder matching

Compatibility

Designed for use in CNMG-style toolholders that accept a 0.5-inch inscribed circle insert with clamp or screw holding methods. Primary workpiece materials are steel (ISO P) and cast iron (ISO K). ISO code CNMG 12 04 08-PF 4425 applies for toolholder and catalog cross-reference.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before indexing or replacing the insert. Seat the insert fully against the toolholder pocket and torque the clamp or screw according to the toolholder manufacturer specifications. Inspect the insert seat and shim for damage before installing a new edge to ensure accurate tool geometry.