Sandvik Coromant 7860953 Turning Insert CNMG431-XF 4425

Product Description

The SANDVIK COROMANT 7860953 is a CNMG-style indexable turning insert designed for general-purpose turning operations on CNC and conventional lathes. Built from a solid carbide substrate and finished with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, this insert delivers wear resistance and thermal stability in continuous and interrupted cutting conditions. It features a 0.4 mm corner radius, an 80-degree diamond insert shape, and a neutral hand orientation. Four cutting edges are available per insert, making it an efficient choice for production turning environments. It belongs to SANDVIK COROMANT's T-Max P series, which is engineered for steel and cast iron machining.

This insert is suited for turning operations where steel is the primary workpiece material (ISO material group P) and cast iron is a secondary application (ISO material group K). The XF chip breaker geometry is optimized for light to medium depth-of-cut finishing passes, producing controlled chip formation and consistent surface finish. Typical applications include shaft turning, facing, and profiling on production lathes in industrial machining environments. The insert is installed and replaced by machinists and CNC operators as part of routine tooling maintenance.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for extended tool life in steel cutting
• XF chip breaker geometry for light-to-medium finishing cuts and controlled chip evacuation
• 80-degree diamond insert shape (CNMG) with neutral hand orientation for versatile turning setups
• Four indexable cutting edges per insert to maximize value per unit
• 0.4 mm corner radius (0.0156 inch) suited to finishing and semi-finishing passes
• ISO code CNMG 12 04 04-XF 4425 for straightforward cross-referencing and procurement

Compatibility

Designed for use in CNMG-compatible turning toolholders that accept a 12.70 mm inscribed circle insert with a clamp or screw holding method. Compatible with ISO insert seat designations for CNMG 1204 geometry. Verify toolholder seat geometry and clamping system compatibility before installation. No specific toolholder model numbers were provided in the product data.

Installation Notes

Installation is performed by qualified machinists or CNC operators following the toolholder manufacturer's torque and clamping guidelines. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and clamping hardware specified for the toolholder to seat the insert securely. Inspect the insert pocket for debris or damage before seating a new cutting edge.