Sandvik Coromant 7860872 Turning Insert DCMT32.52-UM 4425

Product Description

The SANDVIK COROMANT 7860872 is a DCMT-style turning insert designed for precision external turning operations on CNC lathes and turning centers. It features a 55-degree diamond insert shape with a 3/8-inch inscribed circle and a 0.79 mm corner radius. The insert is manufactured from solid carbide and finished with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, providing wear resistance and thermal stability across a range of cutting conditions. This is a neutral-hand insert belonging to the CoroTurn 107 series. It is intended for installation by machinists and CNC tool setup technicians in production and job-shop turning environments.

This insert is suited for turning steel and cast iron workpieces, covering ISO material groups P and K. The CoroTurn 107 series targets light to medium turning passes where consistent surface finish and edge integrity are priorities. The insert is held in place by clamp or screw mounting, making it compatible with standard DCMT-style toolholders used in both production and maintenance machining contexts. The UM chip breaker geometry is designed to handle a range of depths of cut and feed rates on these material groups.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal protection
• 55-degree diamond insert shape with 0.79 mm corner radius for controlled cutting geometry
• 3/8-inch inscribed circle, 0.1563-inch insert thickness, providing rigid edge support
• Neutral hand orientation for use in standard right-hand and left-hand DCMT toolholder setups
• 2 cutting edges per insert, extending service life between indexing
• UM chip breaker geometry optimized for steel and cast iron turning in the CoroTurn 107 series

Compatibility

Designed for use in DCMT-style toolholders compatible with the CoroTurn 107 series. Primary workpiece material is steel (ISO code P); secondary workpiece material is cast iron (ISO code K). ISO insert designation: DCMT 11 T3 08-UM 4425.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-specified clamping hardware when securing the insert via clamp or screw mounting. Inspect the toolholder pocket and seating surface for chips or debris before seating the new insert to ensure proper contact and prevent edge chipping on first cut.