Sandvik Coromant 7858987 Turning Insert Ccmt 4415

Product Description

The SANDVIK COROMANT 7858987 is a solid carbide turning insert in the CoroTurn 107 series, designed for precision external and internal turning operations on CNC lathes and turning centers. It carries an 80-degree diamond shape (C) with a 7-degree relief angle and a 0.4 mm corner radius. The insert features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which delivers thermal resistance and wear protection during moderate to high cutting speeds. Holding method is clamp or screw, and the PF chip breaker geometry is optimized for light to medium finishing cuts on steel and cast iron workpieces.

This insert is suited for finishing and semi-finishing passes in both residential shop and industrial production environments. The PF chip breaker is engineered specifically for steel (ISO material group P) as the primary workpiece material, with secondary suitability for cast iron (ISO material group K). Typical applications include shaft turning, bore finishing, and profile work where controlled chip evacuation and surface finish consistency are priorities. Licensed machinists and CNC operators install this insert as a direct replacement in CoroTurn 107 compatible toolholders.

Key Features

• 80-degree diamond insert shape with 7-degree relief angle for versatile turning geometry
• CVD multilayer coating: TiCN, Al2O3, TiN for thermal and abrasion resistance
• PF chip breaker geometry optimized for light to medium finishing cuts
• Neutral hand orientation for flexible toolholder pairing
• Two cutting edges per insert for extended service life
• Compatible with clamp and screw holding methods

Compatibility

Designed for use in CoroTurn 107 series toolholders accepting CCMT 09 T3 geometry inserts. Primary workpiece material is steel (ISO P); secondary workpiece material is cast iron (ISO K). ISO code: CCMT 09 T3 04-PF 4415.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Power down and lock out the machine spindle before seating or replacing any turning insert. Ensure the toolholder pocket and seating surfaces are clean and free of chips before installing. Follow the toolholder manufacturer's specified clamping torque and screw tightening procedure to prevent insert movement during cutting.