Sandvik Coromant 7860785 Turning Insert CCMT32.51-PF 4425

Product Description

The SANDVIK COROMANT 7860785 is a CCMT-style solid carbide turning insert designed for precision external and internal turning operations on CNC lathes and turning centers. Manufactured under the CoroTurn 107 series, this insert carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, providing wear resistance and thermal stability across a range of cutting speeds. The insert has an 80-degree diamond shape (Insert Shape Code C), a 9.53 mm inscribed circle, and a 0.4 mm corner radius. It is neutral-hand, making it adaptable to both left- and right-hand toolholders. Cutting edge count is 2, maximizing tool economy per insert. The ISO code for this insert is CCMT 09 T3 04-PF 4425.

This insert is rated primarily for steel (ISO material group P) and secondarily for cast iron (ISO material group K), covering the most common workpiece materials encountered in general machining, job shop, and production turning environments. The PF chip breaker geometry is suited for finishing and light roughing passes where chip control and surface finish are critical. Grade 4425 is a CVD-coated carbide grade developed for stable, moderate-to-high cutting speed applications in steel. Machinists and CNC operators in production shops, tool rooms, and maintenance machining will find this insert appropriate for shaft work, flanges, and general-purpose turned components.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal protection
• 80-degree diamond insert shape (CCMT) with 7-degree relief angle for positive cutting geometry
• PF chip breaker geometry optimized for finishing and light roughing on steel
• 9.53 mm inscribed circle with 0.4 mm corner radius for fine feature turning
• 2 cutting edges per insert for cost-effective tool management
• Clamp and screw holding method for secure seating in compatible toolholders

Compatibility

Designed for use in CCMT-compatible toolholders within the CoroTurn 107 series. Suitable for ISO insert size code 09T3 seats. Verify toolholder seat geometry, clamp style, and shim requirements before installation.

Installation Notes

This insert is installed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key driver to the toolholder manufacturer torque specification for the clamping screw. Inspect the insert pocket and shim for wear or debris before seating a new insert to ensure proper support and edge alignment.