Sandvik Coromant 7860880 Turning Insert DCMT32.52-UR 4425

Product Description

The SANDVIK COROMANT 7860880 is a solid carbide turning insert designed for external and internal turning operations on CNC lathes and turning centers. It carries the ANSI insert code DCMT32.52 and ISO code DCMT11T308, featuring a 55-degree diamond (rhombic) shape with a 7-degree relief angle and a 0.79 mm (0.0313 inch) corner radius. The CVD-applied multilayer coating stack — TiCN, Al2O3, and TiN — delivers high wear resistance with moderate toughness, making it well suited for steel roughing and medium machining passes. This insert is part of the CoroTurn 107 series and is intended for installation by machinists and CNC tooling technicians.

This insert is engineered primarily for steel workpiece materials (ISO material group P), targeting applications that demand high wear resistance transitioning to moderate wear resistance and toughness. Typical use cases include roughing and medium machining passes on low-alloy and carbon steels in production turning environments. The UR chip breaker geometry is optimized to control chip flow across varying depths of cut and feed rates common in those operations. The insert fits holders using either clamp or screw mounting methods, consistent with standard CoroTurn 107 tooling setups.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal stability
• 55-degree diamond insert shape (DCMT) with positive side clearance for reduced cutting forces
• UR chip breaker geometry suited for roughing and medium machining operations
• 9.53 mm (0.375 inch) inscribed circle with 0.79 mm corner radius
• Insert thickness of 3.97 mm (0.1563 inch); tolerance code M, clearance code C
• Compatible with clamp and screw insert holding methods
• Manufacturer grade 4425 — optimized for ISO P steel cutting applications

Compatibility

Designed as an OEM-style replacement turning insert for SANDVIK COROMANT CoroTurn 107 series toolholders accepting DCMT32.52 (ANSI) or DCMT11T308 (ISO) inserts with clamp or screw holding. ISO catalog reference: DCMT 11 T3 08-UR 4425.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Always power down and lock out the machine spindle before changing inserts. Seat the insert fully and evenly in the pocket before tightening the clamp or screw to the toolholder manufacturer's specified method; never force or tap an insert into position. Inspect the insert pocket and shim for wear or debris before seating a new insert to ensure proper support and accurate tool geometry.