Sandvik Coromant 7861036 Turning Insert Dcmt 21.50-PF 4425

Product Description

The SANDVIK COROMANT 7861036 is a DCMT-style solid carbide turning insert designed for precision external turning operations on CNC lathes and turning centers. It carries grade 4425 carbide with a CVD-applied multilayer coating of Al2O3, TiCN, and TiN, optimizing tool life and wear resistance across a range of cutting conditions. The insert features a 55-degree diamond shape, a 0.2 mm corner radius, and a neutral hand orientation. It belongs to the CoroTurn 107 series and is suited for productive general turning where consistent edge performance and chip control are required. A licensed machinist or tooling specialist typically selects and installs this insert.

This insert is engineered primarily for turning steel and cast iron workpieces. The PF chip breaker geometry is designed to produce controlled chip formation at light to medium depths of cut, making it well-suited for finish and semi-finish turning passes. With a 1/4 inch inscribed circle and 3/32 inch insert thickness, it fits standard DCMT 07 02 insert pockets common in ISO-style toolholders. Both clamp and screw holding methods are compatible. The ISO designation for this insert is DCMT 07 02 02-PF 4425.

Key Features

• Grade 4425 solid carbide with CVD multilayer Al2O3, TiCN, and TiN coating for extended tool life on steel and cast iron
• 55-degree diamond insert shape (Shape Code D) for versatile turning and profiling operations
• PF chip breaker geometry optimized for controlled chip formation in finish and semi-finish turning
• 0.2 mm (0.0079 inch) corner radius for sharp, accurate edge definition
• Neutral hand orientation compatible with standard DCMT 07 02 insert pockets
• Two cutting edges per insert for cost-effective tooling utilization

Compatibility

Designed for use in ISO-compatible DCMT 07 02 turning toolholders that accept clamp or screw insert retention. The ISO industry standard number is DCMT 07 02 02-PF 4425. Primary workpiece material compatibility is steel (ISO material code P) and cast iron (ISO material code K).

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the turret is in a safe, indexed position before seating or replacing inserts. Use the appropriate torque wrench or insert key specified for the toolholder to secure the clamp or screw — do not overtighten by hand. Verify insert pocket seating and shim condition before resuming cutting operations.