Sandvik Coromant 7860876 Turning Insert CCMT32.51-UR

Product Description

The SANDVIK COROMANT 7860876 is a solid carbide turning insert designed for external and internal turning operations on CNC lathes and turning centers. Cataloged under the CoroTurn 107 series, this insert carries the ISO designation CCMT 09 T3 04-UR 4425 and features an 80-degree diamond shape with a neutral hand orientation. The CVD-applied multilayer coating stack — TiCN, Al2O3, and TiN — is engineered for heat resistance and wear life during steel and cast iron machining. The 4425 grade is a cemented carbide grade suited to continuous and light-interrupted cuts at moderate to high cutting speeds. A 0.40 mm corner radius balances edge strength and surface finish. Two cutting edges per insert are available.

This insert is intended for use in positive-rake CoroTurn 107 toolholders that accept CCMT-style inserts with a clamp and screw holding method. Primary workpiece material is steel (ISO material group P), with cast iron (ISO material group K) listed as a secondary application. Typical use cases include shaft turning, facing, and contour turning in production environments. The UR chip breaker geometry is suited to universal roughing and medium finishing passes. This insert is sold individually; minimum order quantity is 10 units.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for thermal resistance and extended tool life
• 80-degree diamond insert shape (Shape Code C) for versatile turning and light profiling
• 4425 carbide grade optimized for steel and cast iron at moderate to high cutting speeds
• UR chip breaker geometry for universal roughing and medium finishing applications
• Neutral hand orientation compatible with both right- and left-hand toolholder setups
• Clamp and screw holding method for secure, repeatable insert positioning

Compatibility

Designed for use in CoroTurn 107 series toolholders accepting CCMT-style inserts with clamp and screw holding. ISO insert designation CCMT 09 T3 04-UR 4425; manufacturer catalog number CCMT 3(2.5)1-UR 4425. Compatible toolholders must be configured for positive-rake CCMT geometry with a 4.40 mm bore hole.

Installation Notes

Turning insert replacement is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the correct Torx or hex key for the clamping screw as specified by the toolholder manufacturer — do not overtighten, as insert cracking or seat damage can result. Inspect the insert pocket and shim seat for wear or debris before seating a new insert.