Hertel 06821680 Roughing End Mill 5/8 in 4 Flute Cobalt M42

Product Description

The HERTEL 06821680 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers the heat and wear resistance needed for ferrous and hard materials. The 5/8 inch diameter cutter features 4 flutes in a right-hand cutting and right-hand flute configuration, with a 1.625 inch length of cut and a 3.75 inch overall length. The non-center-cutting design means it is intended for side milling, slotting, and profile work rather than plunge cutting. Machinists and toolroom operators handling roughing passes will find this a reliable production option.

This end mill is suited for roughing applications on manual mills and CNC machining centers in job shop and production environments. The regular-length geometry and 5/8 inch straight shank allow it to fit standard ER and side-lock toolholders without extended reach adapters. Its cobalt M42 construction makes it a practical choice when cutting alloy steels, stainless steel, and other materials that generate significant heat at the cutting edge. The bright finish keeps the tool ready for use without additional prep.

Key Features

• M42 cobalt high-speed steel construction for elevated heat resistance during roughing passes
• 4 right-hand flutes with right-hand cutting direction for efficient chip evacuation
• 5/8 inch cutter diameter matches 5/8 inch straight shank for consistent concentricity in standard toolholders
• Non-center-cutting single-end design optimized for side milling and profiling
• Bright, uncoated finish compatible with most cutting fluids and coolant systems
• Regular-length classification for rigid setups with minimal overhang

Compatibility

Designed as an OEM-style replacement or direct-use roughing end mill for standard 5/8 inch straight-shank toolholder systems on manual and CNC milling equipment.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully stopped and locked before changing tooling. Seat the shank fully in the toolholder to the recommended engagement depth before tightening set screws or collet nuts. Because this is a non-center-cutting tool, do not attempt plunge cuts directly into solid material.