Sandvik Coromant 5853449 Round Milling Insert S40T Carbide

Product Description

The SANDVIK COROMANT 5853449 is a single-sided, round milling insert in grade S40T, manufactured from solid carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN. It carries an inscribed circle of 0.5000 inches and a thickness of 0.1563 inches (3.97 mm). With six cutting edges, a neutral hand orientation, a positive rake angle of 20 degrees, and a PM chip breaker geometry, this insert is engineered for high-feed face milling operations in demanding materials. The insert is held in place with a screw and fits the R300 and RA300 cutter series. Licensed machinists and tooling specialists handle installation and indexing.

This insert is designed for milling stainless steel, superalloys, and titanium — material groups M and S in ISO classification. Its rounded cutting edge style and positive rake geometry help manage heat and cutting forces when working tough, work-hardening materials in both roughing and semi-finishing passes. It conforms to both ANSI and ISO standards, with a catalog designation of R300-1340M-PM S40T and an insert size code of 1340. Typical applications include face milling and shoulder milling on CNC machining centers in production and job-shop environments.

Key Features

• Solid carbide substrate in manufacturer grade S40T, rated for ISO material groups M40 and S35
• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal protection
• Round insert shape with 6 cutting edges for extended tool life per insert
• Positive rake angle (20 degrees) with PM chip breaker reduces cutting forces on difficult materials
• Inscribed circle of 0.5000 inches with a corner radius of 0.2500 inches
• Maximum depth of cut of 0.1252 inches (3.18 mm)

Compatibility

Compatible with Sandvik Coromant R300 and RA300 cutter series, as specified by the manufacturer. ANSI and ISO catalog code: R300-1340M-PM S40T. Insert size code: 1340.

Installation Notes

Indexing and replacement of milling inserts should be performed by a qualified machinist or tooling technician with the machine fully powered down and all spindle rotation stopped. Use the appropriate Torx or hex key for the insert clamping screw; do not overtighten, as carbide inserts are brittle and can fracture under excessive clamp force. Inspect the pocket seat and clamping screw condition before seating a new insert. Confirm correct insert orientation and seating before resuming any cutting operations.