Sandvik Coromant 7860810 Turning Insert CCMT21.52-PM 4425

Product Description

The SANDVIK COROMANT 7860810 is a solid carbide turning insert in the CoroTurn 107 series, designed for external and internal turning operations on CNC lathes and turning centers. Designated by ANSI code CCMT21.52 and ISO code CCMT 06 02 08, this insert features an 80-degree diamond (rhombic) shape with a positive side clearance and a neutral hand orientation. It carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN under manufacturer grade 4425, optimized for high wear resistance on steel with moderate toughness for medium to roughing chip loads. The 0.79 mm corner radius and 0.25-inch inscribed circle suit a wide range of finishing and semi-finish turning pass depths on ferrous workpieces.

This insert is intended for primary use on steel (ISO material group P) and secondary use on cast iron (ISO material group K) in both roughing and medium machining operations. The PM chip breaker geometry promotes effective chip control during interrupted and continuous cuts at moderate to aggressive feed rates. Typical applications include shaft turning, sleeve boring, and facing operations on CNC equipment in production and job-shop environments. Installation is performed by qualified machinists and CNC programmers. The two available cutting edges help manage tooling cost per part in high-volume production runs.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for high wear resistance on steel
• 80-degree diamond insert shape (CCMT) with positive side clearance reduces cutting forces
• PM chip breaker geometry rated for roughing and medium machining operations
• Grade 4425 provides a balance of wear resistance and toughness on ISO P and K materials
• Two cutting edges per insert for extended tooling economy
• Neutral hand orientation compatible with clamp and screw insert holding methods

Compatibility

Designed for use in CoroTurn 107 series toolholders that accept CCMT 06 02 insert seats with clamp or screw holding. Primary workpiece material is steel (ISO P); secondary workpiece material is cast iron (ISO K).

Installation Notes

Insert seating and torque should follow the toolholder manufacturer specifications for CoroTurn 107 screw-clamp systems. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and seating surface for chips or debris before seating the new insert. Use appropriate insert handling tools to avoid contact with the cutting edge.