Hertel 41120502 Roughing End Mill 3/8 in 4 Flute Cobalt

Product Description

The HERTEL 41120502 is a single-end cobalt roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance suited to tough ferrous and non-ferrous materials. The 3/8 inch diameter, 4-flute configuration with a fine pitch produces a ripping action that breaks chips into smaller segments, reducing cutting forces and heat buildup. The bright uncoated finish makes it a straightforward workhorse for general-purpose roughing applications. Installed by machinists and toolroom professionals, this end mill fits standard milling machines, machining centers, and CNC setups.

This end mill is suited for roughing passes on ferrous metals and similar materials in both manual and CNC milling environments. The 3/4 inch length of cut and 2-1/2 inch overall length make it appropriate for moderate-depth pockets, slots, and peripheral cuts in production and job-shop settings. The right-hand cutting and right-hand flute direction are standard for conventional and climb milling on vertical mills and machining centers. Centercutting capability allows plunge entry without a pre-drilled pilot hole.

Key Features

• M42 cobalt HSS construction for elevated heat resistance and extended tool life in tough materials
• Fine-pitch roughing profile breaks chips efficiently and reduces cutting forces
• 4-flute, single-end design balances chip clearance with rigidity
• Centercutting geometry allows direct plunge entry
• Right-hand cut and right-hand flute direction for standard milling setups
• Bright uncoated finish — no coating buildup concerns on re-sharpening

Compatibility

Designed as a standard 3/8 inch shank roughing end mill compatible with any milling machine, CNC machining center, or end mill holder accepting a 3/8 inch straight shank.

Installation Notes

Installation is performed by a machinist or toolroom technician using an appropriate end mill holder, collet chuck, or milling chuck rated for 3/8 inch shanks. Power down and lock out the spindle before changing tooling. Verify tool runout with an indicator after seating to avoid premature wear or chatter. Follow the machine manufacturer and tooling guidelines for speed and feed selection based on workpiece material.