Hertel E2039024 Square End Mill 3/8 Inch 4 Flute Cobalt

Product Description

The HERTEL E2039024 is a 4-flute cobalt square end mill designed for milling operations in ferrous and difficult-to-machine materials. Built from M42 cobalt high-speed steel, it delivers the heat and wear resistance needed for aggressive cuts in stainless steel, high-temperature alloys, and hardened steels. The 3/8-inch diameter and 30-degree helix angle promote efficient chip evacuation and smooth cutting action across a range of milling applications. At 2.5 inches overall length with a 0.75-inch length of cut, this is a standard-reach tool suited to slotting, profiling, and peripheral milling tasks. Uncoated finish. Installed and used by machinists and tool-and-die professionals.

This end mill is sized for use in vertical machining centers, knee mills, and manual milling machines where a 3/8-inch collet or end mill holder is available. The centercutting geometry allows plunge entry directly into the workpiece without a pre-drilled hole. Right-hand cut and right-hand flute configuration is the standard orientation for conventional CNC and manual milling setups. Typical applications include slotting, side milling, and contouring in production and job-shop environments.

Key Features

• M42 cobalt HSS construction for heat resistance in tough and abrasive materials
• 4-flute spiral design with 30-degree helix angle for efficient chip evacuation
• Centercutting geometry allows direct plunge entry without pre-drilling
• Right-hand cut and right-hand flute for standard milling machine compatibility
• Uncoated finish suitable for use with cutting fluids on difficult alloys
• Regular length configuration at 2.5 inches OAL for rigidity in standard-depth cuts

Compatibility

Designed as an OEM-style replacement or direct-use tool for machines accepting a 3/8-inch shank end mill in a standard collet, end mill holder, or milling chuck.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully powered down and locked before changing tooling. Secure the shank to the minimum recommended engagement depth in the holder to prevent pull-out during cutting. Always verify spindle speed and feed rate against material specifications before initiating a cut.