Sandvik Coromant 7860884 Turning Insert CNMG431-WF 4425

Product Description

The SANDVIK COROMANT 7860884 is a solid carbide turning insert designed for precision metal turning operations on CNC lathes and turning centers. It carries the ANSI insert code CNMG431 and ISO designation CNMG 12 04 04-WF 4425, belonging to the T-Max P series. The insert features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, engineered for high wear resistance with maintained toughness when cutting steel. With a WF chip breaker geometry optimized for wiper finishing passes, this insert delivers fine surface finishes at elevated feed rates. It is installed by machinists and CNC operators in production turning environments where consistent part quality and tool life are the primary concerns.

This insert is suited for finishing operations on steel as the primary workpiece material, with secondary applicability on cast iron. The WF chip breaker designation indicates a wiper finishing geometry, making it appropriate for light depth-of-cut passes where tight surface finish tolerances are required. It is used in both high-volume production and job-shop turning applications. The neutral hand orientation allows use in standard right-hand turning setups. The 80-degree diamond (rhombic) insert shape provides a sturdy cutting edge suitable for longitudinal turning and facing operations.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for high wear resistance and thermal protection
• WF wiper finishing chip breaker geometry for superior surface finish at standard finishing feeds
• 80-degree diamond (rhombic) insert shape with negative side clearance for rigid, stable cutting
• 4 usable cutting edges per insert for extended tooling economy
• Inscribed circle of 0.5000 inches (12.70 mm) with 0.0156-inch corner radius for fine-detail finishing
• Compatible with clamp and screw insert holding methods

Compatibility

Designed for use in SANDVIK COROMANT T-Max P series toolholders accepting CNMG431 (ISO CNMG 12 04 04) inserts with clamp or screw clamping. Verify toolholder pocket specifications before installation.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the turret is in a safe indexed position before changing inserts. Use the correct torque wrench and seating procedures specified by the toolholder manufacturer when securing the clamping screw or clamp to avoid insert fracture or improper seating. Inspect the toolholder pocket for chips or wear before installing a new insert.