Sandvik Coromant 5743953 Milling Insert R245 4220 Grade

Product Description

The SANDVIK COROMANT 5743953 is a square-shaped, solid carbide milling insert designed for use in face and shoulder milling operations. Built to ANSI and ISO standards under the R245-12 T3 M-PL 4220 designation, this insert carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN for extended tool life and wear resistance. It measures 0.5276 inches in inscribed circle diameter and 0.1563 inches thick, with a 1.50 mm corner radius and four available cutting edges. The positive rake geometry and PL chip breaker promote controlled chip evacuation and reduced cutting forces across a range of materials.

This insert is intended for professional machinists and tooling technicians running R245-series milling cutters in production and job-shop environments. It performs on steel, cast iron, and hard materials, aligning with material grades P20 and H25. Typical applications include face milling, shoulder milling, and pocketing passes where consistent surface finish and reliable edge life are required. The right-hand configuration and screw-holding method suit standard R245 cutter bodies in both horizontal and vertical machining centers.

Key Features

• Solid carbide substrate with CVD multilayer coating: TiCN, Al2O3, and TiN for heat and wear resistance
• 4220 manufacturer grade rated for steel, cast iron, and hard material applications
• Four cutting edges per insert, single-sided configuration
• Positive rake angle of 10 degrees with PL chip breaker for controlled chip flow
• Maximum depth of cut of 0.2559 inches (6.50 mm)
• ANSI and ISO compliant: R245-12 T3 M-PL 4220

Compatibility

Designed for use with R245-series cutter bodies. The insert size code is 12T3, and the cutter series compatibility is listed as R245. Verify seating and screw fit against the specific cutter body before installation.

Installation Notes

Installation is performed by qualified tooling technicians or machinists. Ensure the machine spindle is fully stopped and locked out before seating or removing inserts. Use the correct Torx or hex key for the clamping screw specified by the cutter body documentation — do not overtighten, as solid carbide inserts are brittle and susceptible to fracture under excessive clamping load. Inspect the insert pocket and seating surface for chips or debris before installing a fresh insert.