Sandvik Coromant 7564557 Milling Insert Grade 4340 Carbide

Product Description

The SANDVIK COROMANT 7564557 is a solid carbide milling insert designed for high-productivity face and shoulder milling operations. It carries a manufacturer grade of 4340 and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability across a broad range of cutting conditions. The insert measures 9.5 mm wide and 4.45 mm thick, with a corner radius of 0.80 mm. It seats in screw-lock toolholders and delivers four usable cutting edges per insert. This part is used by machinists and tooling technicians in production and job-shop environments.

This insert is suited for milling steel, stainless steel, and cast iron workpieces, corresponding to ISO material groups P, M, and K. It fits the N331.1A insert style and is compatible with the L331.52C cutter series. The PM chip breaker geometry supports stable chip formation at moderate to aggressive feed rates. The neutral hand orientation and positive rake angle make it adaptable to a range of milling strategies including face milling and square shoulder milling. Typical applications include roughing and semi-finishing passes on medium to large component features.

Key Features

• CVD multilayer coating: TiCN, Al2O3, TiN for extended tool life on steel and cast iron
• Four cutting edges per insert - reduces per-edge tooling cost
• Positive rake with PM chip breaker geometry for controlled chip evacuation
• Corner radius of 0.80 mm reduces insert chipping at entry and exit
• Screw-lock holding method for rigid, repeatable seating in the toolholder pocket
• Neutral hand orientation - compatible with both climb and conventional milling setups

Compatibility

Designed for use in the L331.52C cutter series. Insert style is N331.1A, insert size code 084508. ANSI and ISO code: N331.1A-08 45 08M-PM4340. Verify pocket geometry and screw torque specifications against the cutter body documentation before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct Torx or hex key specified by the cutter body manufacturer to secure the clamping screw - do not substitute fasteners. Inspect the pocket seat and clamping screw threads for wear or debris before installing a fresh insert.