Sandvik Coromant 7861037 Turning Insert Dcmt 32.50-PF 4425

Product Description

The SANDVIK COROMANT 7861037 is a solid carbide turning insert in the DCMT style, designed for external turning operations on CNC and conventional lathes. It carries the grade designation 4425 and features a CVD-applied multilayer coating of Al2O3, TiCN, and TiN for wear resistance and thermal stability. The insert has a 55-degree diamond shape (shape code D), a 3/8-inch inscribed circle, and a 0.20 mm corner radius, making it well suited for finishing and semi-finishing passes. It is part of the CoroTurn 107 series and is held in place by a clamp or screw depending on the toolholder. Machinists and CNC operators install this insert in production and job-shop environments.

This insert is intended primarily for machining steel (ISO material code P) and secondarily for cast iron (ISO material code K). The neutral hand orientation makes it compatible with standard right-hand toolholders used in the CoroTurn 107 system. It is a single-piece insert with 2 cutting edges, a clearance code of C, and a tolerance code of M. Typical applications include longitudinal turning, facing, and profiling on low-alloy and carbon steels as well as grey cast iron components in medium-volume production runs.

Key Features

• CVD multilayer coating: Al2O3, TiCN, and TiN for extended tool life on steel and cast iron
• 55-degree diamond insert shape with 2 usable cutting edges per insert
• 0.20 mm (0.0079 inch) corner radius for controlled surface finish on finishing passes
• Manufacturer grade 4425 optimized for ISO P (steel) and ISO K (cast iron) workpiece materials
• PF chip breaker geometry for reliable chip control in light to medium cuts
• Part of the CoroTurn 107 series, compatible with clamp and screw holding methods

Compatibility

Designed for use in CoroTurn 107 series toolholders that accept DCMT-style inserts with a 3/8-inch inscribed circle. ISO standard number is DCMT 11 T3 02-PF 4425. Manufacturer catalog reference is DCMT 3(2.5)0-PF.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. The machine spindle must be stopped and the turret or toolholder fully secured before seating or indexing the insert. Use the appropriate torx or hex key to the toolholder manufacturer's specified procedure when tightening the clamp or screw. Inspect the insert pocket and seating surface for chips or debris before installing a new edge to ensure proper seating and repeatability.