Hertel 41120742 Roughing End Mill 1/2 in 4 Flute Cobalt

Product Description

The HERTEL 41120742 is a single-end roughing end mill designed for aggressive material removal in ferrous and non-ferrous metals. Built from M42 cobalt high-speed steel with a TiCN coating, this tool handles elevated cutting temperatures while maintaining edge hardness across extended production runs. The 1/2 inch diameter cutter features four right-hand flutes with a fine pitch geometry that reduces chatter and vibration during heavy roughing passes. With a 2 inch length of cut and a 4 inch overall length, it is well suited for side milling, slotting, and step machining operations on CNC machining centers and manual knee mills.

This end mill is intended for machinists, tool and die makers, and production floor operators working on roughing applications in steel, stainless, cast iron, and similar materials. The center-cutting configuration allows plunge entry, giving operators flexibility during pocket-start operations. Regular length geometry keeps the tool rigid, minimizing deflection in high-feed scenarios. The right-hand cutting and right-hand flute direction are standard for conventional milling setups.

Key Features

• M42 cobalt HSS construction resists heat and wear at high cutting speeds
• TiCN coating reduces friction and extends tool life in ferrous materials
• Fine pitch, 4-flute design dampens vibration during aggressive roughing cuts
• Center-cutting capable for direct plunge entry without a pilot hole
• Right-hand cut and right-hand helix for standard spindle compatibility
• Single-end configuration with regular length for maximum rigidity

Compatibility

Designed as a standard 1/2 inch shank roughing end mill for use in collet chucks, end mill holders, and Weldon-style tool holders on CNC and manual milling machines accepting 1/2 inch shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the tool holder is clean and free of chips before seating the shank. Verify runout with a dial indicator after clamping to confirm proper seating. Follow the machine tool manufacturer and cutting tool manufacturer recommendations for speeds and feeds based on workpiece material.