Hertel 41120403 Roughing End Mill 5/8 in 4 Flute Cobalt

Product Description

The HERTEL 41120403 is a single-end roughing end mill designed for high-material-removal operations in milling applications. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers durability and heat resistance when cutting ferrous and harder alloy materials. The tool features a 5/8 inch cutting diameter, four flutes arranged in a coarse pitch configuration, and a right-hand cutting and flute direction. Center-cutting geometry allows plunge entry as well as conventional peripheral milling. Installed by machinists and tooling professionals in manual and CNC milling setups, this end mill suits production and job-shop environments where aggressive stock removal is the priority.

This roughing end mill is suited for use on vertical and horizontal milling machines as well as CNC machining centers. The coarse pitch flute geometry is designed to break chips efficiently and reduce cutting pressure, making it effective on medium to hard steels, stainless, and similar materials. Its regular-length configuration fits standard toolholders and collet chucks with a 5/8 inch bore. The single-end design is common in production shops where tool rotation and re-grinding are part of standard tooling management.

Key Features

• M42 cobalt high-speed steel construction for improved heat and wear resistance
• Coarse pitch, 4-flute design promotes aggressive chip evacuation and reduced cutting pressure
• Center-cutting geometry enables direct plunge entry without a pre-drilled pilot hole
• Bright, uncoated finish suitable for use with or without cutting fluid
• Right-hand cut and right-hand flute direction for standard milling spindle compatibility
• Regular length profile fits common collet chucks and end mill holders with 5/8 inch bore

Compatibility

Designed as a standard-shank roughing end mill for use in milling machines and CNC machining centers accepting a 5/8 inch shank diameter toolholder or collet chuck.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the milling machine spindle is fully stopped and locked out before inserting or removing the end mill from the toolholder. Verify collet or holder bore matches the 5/8 inch shank diameter and that the tool is seated to the correct gauge length before tightening. Follow shop-standard torque procedures for the specific toolholder type in use.