Cleveland C43301 Roughing End Mill 5/8 in 4 Flute Hss-e-pm

Product Description

The CLEVELAND C43301 is a single-end roughing end mill designed for aggressive stock removal in ferrous and non-ferrous metals. Built from M42 grade powdered metal cobalt (HSS-E-PM), it delivers superior heat and wear resistance compared to standard high-speed steel tooling. The coarse-pitch spiral flute geometry breaks chips efficiently, reducing heat buildup and cutting forces during heavy roughing passes. At 0.625 inches in diameter with a 1.625-inch length of cut and a 3.75-inch overall length, this tool fits standard milling setups. It is installed and operated by machinists and tool-and-die professionals working on CNC and manual milling machines.

This roughing end mill is suited for roughing operations in job shops, production machining environments, and maintenance repair applications. The Weldon flat shank provides positive tool holding in standard set-screw style holders, making it compatible with common tooling setups found in vertical and horizontal milling machines. The bright, uncoated finish is appropriate for use with cutting fluid in general-purpose metal removal operations where coating adhesion or post-coat regrind is not a requirement.

Key Features

• M42 powdered metal cobalt (HSS-E-PM) construction for elevated hot hardness and extended tool life
• Coarse-pitch spiral flute design promotes aggressive chip breaking and reduced cutting forces
• 4-flute, right-hand cut and right-hand flute configuration for standard milling operations
• Weldon flat shank provides secure, positive engagement in set-screw tool holders
• 30-degree maximum helix angle balances cutting efficiency with edge strength
• Bright, uncoated finish for compatibility with a wide range of cutting fluids

Compatibility

Designed for use in standard 5/8-inch bore Weldon-style end mill holders on CNC and manual vertical milling machines. Compatible with set-screw tool holding systems that accept a 0.625-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Power down and lock out the machine spindle before inserting or removing the end mill from the holder. Ensure the Weldon flat is properly aligned with the set screw before torquing the holder. Inspect the shank and holder bore for chips or damage before each use to maintain concentricity and prevent premature tool wear.