Hertel 41120429 Roughing End Mill 5/8 in 4 Flute Cobalt

Product Description

The HERTEL 41120429 is a single-end cobalt roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel, it handles tough ferrous and non-ferrous materials where standard HSS tools wear prematurely. The 5/8 inch diameter cutter features 4 flutes with a coarse pitch geometry, which breaks chips into smaller segments and reduces cutting forces during heavy roughing passes. With a 2.5 inch length of cut and a bright, uncoated finish, this tool is suited for conventional roughing operations on manual mills and CNC machining centers. Machinists and tool-and-die professionals install this type of end mill for stock removal prior to finishing passes.

This roughing end mill is used in job shop, production machining, and maintenance environments where rapid material removal is the priority. The 5/8 inch shank diameter matches the cutter diameter, making it compatible with standard R8, CAT, BT, and straight-shank toolholders of that bore size. Right-hand cutting direction and right-hand flute direction are standard for conventional spindle rotation. The coarse pitch and 4-flute count make it well-suited for slotting and peripheral roughing in steel, stainless, and similar alloys.

Key Features

• M42 cobalt construction for extended tool life in hard and abrasive materials
• Coarse pitch flute geometry breaks chips aggressively and reduces heat buildup
• Center-cutting design allows plunge entry without a pre-drilled hole
• Bright/uncoated finish maintains consistent edge geometry without coating buildup
• Right-hand cut and right-hand helix for use with standard spindle rotation
• Single-end configuration with regular length for rigid, low-overhang setups

Compatibility

Designed as a standard single-end roughing end mill with a 5/8 inch shank diameter, compatible with any toolholder or collet chuck accepting a 0.625 inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Power down and lock out the machine spindle before loading or unloading the tool. Seat the shank fully in the collet or toolholder and torque the retention hardware per the toolholder manufacturer specification. Inspect the cutting edges before use and replace the tool if chipping or wear is observed.