Cleveland C31955 Square End Mill 9/16 in 4 Flute PM-4

Product Description

The CLEVELAND C31955 is a 4-flute powdered metal square end mill designed for material removal in milling operations across a range of ferrous and non-ferrous workpiece materials. Built to PM-4 series standards, it features a 9/16 inch cutting diameter, a 1-3/8 inch length of cut, and a 1/2 inch straight-cylindrical shank with a Weldon flat for positive drive retention. The M42 powdered metal construction provides the wear resistance and red hardness needed for higher-feed applications. The 37-degree helix spiral flute geometry promotes chip evacuation and surface finish quality. This is an uncoated, right-hand cut, right-hand flute tool intended for professional machining environments.

The C31955 is suited for conventional milling applications in job shops, production machining cells, and maintenance-and-repair operations. Primary workpiece material codes H, K, M, P, and S indicate compatibility with hardened steels, cast irons, stainless steels, carbon and alloy steels, and superalloys. The regular-length configuration and 3-3/8 inch overall length make it appropriate for standard-reach slotting, profiling, and peripheral milling operations on vertical or horizontal milling machines and CNC machining centers.

Key Features

• M42 powdered metal construction for improved wear resistance and hot hardness over standard HSS
• 37-degree helix angle spiral flute promotes efficient chip evacuation and reduces cutting forces
• Center-cutting design allows for direct plunge entry without a pre-drilled pilot hole
• Straight-cylindrical shank with Weldon flat for secure tool holding in set-screw style chucks
• Right-hand cut, right-hand flute geometry — standard orientation for most vertical milling setups
• Uncoated finish suitable for use with cutting fluids across a broad material range

Compatibility

Designed for use in standard 1/2 inch end mill holders, Weldon-style side-lock holders, or collet chucks that accommodate a 1/2 inch shank diameter. Suitable for workpiece material codes H, K, M, P, and S as specified by the manufacturer.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the holder. Seat the shank to the recommended insertion depth in the holder and torque set screws to the tool holder manufacturer's specification. Confirm runout with a dial indicator before commencing a cut, and apply appropriate cutting fluid for the workpiece material being machined.