Sandvik Coromant 7860792 Turning Insert CNMG433-PF 4425

Product Description

The SANDVIK COROMANT 7860792 is a CNMG-style indexable turning insert designed for external turning operations on CNC lathes and turning centers. It carries the ISO designation CNMG 12 04 12-PF 4425 and belongs to the T-Max P series. The insert is manufactured from solid carbide substrate with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, targeting wear resistance and thermal stability during continuous and interrupted steel and cast iron cutting. The 80-degree diamond shape provides a strong nose geometry, and the PF chip breaker is optimized for finishing and light roughing passes. With a 1/2 inch (0.5000 inch) inscribed circle and a 1.19 mm (0.0469 inch) corner radius, this insert fits standard CNMG toolholders and delivers consistent edge performance across multiple cutting edges.

This insert is suited for production turning in residential shop, job shop, and industrial manufacturing environments. The grade 4425 is formulated for steel as the primary workpiece material (ISO material code P) and cast iron as the secondary workpiece material (ISO material code K). The PF chip breaker geometry handles finishing cuts where close tolerances and surface finish consistency are priorities. It is used by machinists and CNC operators on lathes requiring a neutral-hand, screw-and-clamp held insert in CNMG pocket toolholders. This insert is sold individually; minimum order quantity is 10 units per purchase.

Key Features

• CVD multilayer coating — TiCN, Al2O3, TiN — for wear resistance on steel and cast iron
• 80-degree diamond insert shape (Shape Code C) provides strong cutting geometry for turning operations
• PF chip breaker geometry optimized for finishing and light roughing applications
• Neutral hand orientation compatible with standard CNMG clamp and screw toolholder pockets
• 4 cutting edges per insert for extended tool life and lower cost per edge
• Tolerance Code M and Clearance Code N meet standard CNMG dimensional specifications

Compatibility

Designed as an OEM-style indexable replacement for CNMG 12 04 12 pocket toolholders that accept clamp and screw insert holding. The ISO insert code CNMG 12 04 12-PF 4425 can be cross-referenced using the manufacturer catalog number CNMG 433-PF 4425 when sourcing equivalent toolholder fits.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and zero out the machine before indexing or replacing inserts. Use the appropriate torx or hex key as specified by the toolholder manufacturer to achieve proper seating torque on the clamp screw — do not over-torque or under-torque the clamping mechanism. Inspect the toolholder pocket for chips, debris, or wear before seating a new insert edge.