Sandvik Coromant 7859053 Turning Insert DCMT32.51-PF 4415

Product Description

The SANDVIK COROMANT 7859053 is a solid carbide turning insert designed for precision external and internal turning operations on CNC lathes and turning centers. Designated DCMT32.51-PF 4415, it carries a 55-degree diamond shape (Insert Shape Code D) with a 7-degree relief angle and a 0.40 mm (0.0156 inch) corner radius. The insert features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which builds wear resistance and thermal stability when machining steel and cast iron. The PF chip breaker geometry is optimized for finishing cuts on steel. Licensed machinists and CNC operators install this insert as part of routine tooling maintenance in production turning environments.

This insert belongs to the CoroTurn 107 series and is suited for light to medium finishing passes in steel (ISO material group P) and cast iron (ISO material group K) workpiece materials. It is held by clamp or screw mounting in compatible DCMT-style toolholders. The neutral hand orientation makes it compatible with both right-hand and left-hand setups where DCMT geometry is specified. The PF chip breaker is particularly effective in close-tolerance finishing applications where chip control and surface finish are priorities.

Key Features

• 55-degree diamond insert shape for versatile turning and profiling
• CVD multilayer coating: TiCN, Al2O3, and TiN for extended tool life on steel and cast iron
• PF chip breaker geometry optimized for steel finishing operations
• Neutral hand orientation supports flexible toolholder setups
• Two cutting edges per insert for cost efficiency during routine indexing
• ISO code DCMT 11 T3 04-PF 4415 for cross-reference with toolholder specifications

Compatibility

Designed for use in DCMT-style toolholders compatible with the CoroTurn 107 series. The ISO designation DCMT 11 T3 04-PF 4415 can be used to confirm toolholder fitment. Clamp and screw holding methods are supported. Verify toolholder seat geometry and insert pocket dimensions before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque driver for the clamping screw to avoid seat deformation or insert cracking — refer to the toolholder manufacturer specification for the correct fastener torque. Inspect the insert seat and chip pocket for debris or wear before seating a new insert.