Sandvik Coromant 6868234 Turning Insert CCMT21.52-KR

Product Description

The SANDVIK COROMANT 6868234 is a solid carbide turning insert designated CCMT21.52-KR 3225, part of the CoroTurn 107 series. It features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN engineered for high wear resistance to high toughness in cast iron applications. The insert carries an 80-degree diamond (rhombic) shape with a neutral hand orientation, a 1/4-inch inscribed circle, and a 1/32-inch corner radius. With two cutting edges and a KR chip breaker geometry, it handles roughing through medium machining operations. Licensed machinists and CNC operators install this insert in compatible CCMT-style toolholders for external turning and profiling work.

This insert is suited for cast iron workpieces in production turning environments, covering both roughing and medium machining passes. The KR chip breaker geometry promotes controlled chip formation across a range of feed rates and depths of cut, with a maximum depth of cut of 5.65 mm. The grade 3225 is specifically characterized for cast iron (K-grade) applications where wear resistance is the primary concern. It is secured in the toolholder by a screw-clamping method, consistent with standard CCMT indexable insert setups found in both manual lathe and CNC turning center installations.

Key Features

• CVD multilayer coating: TiCN, Al2O3, TiN for extended tool life in cast iron
• 80-degree diamond insert shape with positive side clearance and 7-degree relief angle
• KR chip breaker geometry rated for roughing and medium machining operations
• 1/32-inch (0.0313 inch) corner radius with rounded cutting edge style
• Two usable cutting edges per insert for economical indexing
• Screw-held mounting compatible with standard CCMT-style toolholders

Compatibility

Designed for use in CCMT-style screw-clamp toolholders accepting the CCMT21.52 (ISO: CCMT 06 02 08) insert size. Verify toolholder pocket specifications and insert seating before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine before indexing or replacing inserts. Use the correct torque wrench for the clamping screw to avoid insert movement or fracture during operation. Inspect the toolholder pocket for debris or wear before seating a new insert.