Hertel E2041032 Square End Mill 0.5 in 4 Flute Cobalt

Product Description

The HERTEL E2041032 is a solid cobalt square end mill designed for milling operations that require an extended reach and a long length of cut. Built from M42 cobalt high-speed steel, it delivers improved heat and wear resistance compared to standard M2 HSS tooling. The 0.5-inch diameter cutting edge spans a 3-inch length of cut on a 0.5-inch shank, with a 5-inch overall length that places it in the extra-long category. The 30-degree right-hand spiral flute geometry promotes efficient chip evacuation. This tool is centercutting, making it capable of plunge entry without a pre-drilled pilot hole. Machinists and tool-and-die professionals use it in CNC and manual milling applications where standard-length end mills cannot reach.

This end mill is suited for milling slots, pockets, and profiles in ferrous and non-ferrous materials where deep or extended-reach cuts are required. The extra-long configuration makes it appropriate for cavity work, deep-pocket milling, and setups where workpiece geometry demands additional clearance between the spindle and the workpiece surface. The uncoated finish allows regrinding without coating re-application, extending usable tool life in job shop environments.

Key Features

• M42 cobalt construction for improved red hardness and wear resistance over standard HSS
• 4-flute, 30-degree right-hand spiral geometry for balanced chip load and surface finish
• Centercutting design allows direct plunge entry into the workpiece
• Extra-long length type with 3-inch LOC and 5-inch OAL for deep-reach applications
• Uncoated finish supports regrinding and re-sharpening
• Single-end configuration with right-hand cut and right-hand flute direction

Compatibility

Designed as a standard 0.5-inch shank end mill compatible with collet chucks, end mill holders, and milling machine spindles accepting 1/2-inch straight shank tooling.

Installation Notes

Installation and tool changes should be performed only when the spindle is fully stopped and the machine is powered down or in an e-stop state. Ensure the shank is fully seated and clamped to the recommended engagement depth in the tool holder to minimize runout. Proper speeds and feeds for cobalt end mills vary by workpiece material and should be calculated before cutting. A licensed machinist or trained operator should verify setup before initiating a cut.