Hertel E2031903 Square End Mill 0.5 in 4 Flute Cobalt

Product Description

The HERTEL E2031903 is a 4-flute cobalt square end mill designed for general-purpose milling operations in machine shop and manufacturing environments. With a 0.5 inch cutting diameter and a 1 inch length of cut, this tool handles slotting, profiling, and peripheral milling on a range of ferrous and non-ferrous workpiece materials. The 3/8 inch shank diameter fits standard collets and end mill holders on vertical and horizontal machining centers as well as manual knee mills. Cobalt construction in M42 grade provides elevated heat and wear resistance compared to standard high-speed steel, making it well suited for harder steels and stainless alloys.

This end mill is intended for production and job-shop machinists running conventional or CNC milling equipment. The regular-length geometry and 2-11/16 inch overall length make it a practical choice for general-depth cuts where extended reach is not required. The 30-degree spiral helix and right-hand cut with right-hand flute configuration produce efficient chip evacuation during climb and conventional milling. It ships as a single unit and is appropriate for toolroom use, fixture work, and general metal removal applications.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS
• 4-flute spiral design with 30-degree helix angle for efficient chip flow
• Right-hand cut and right-hand flute for standard milling machine spindle direction
• Uncoated finish suitable for use with cutting fluid on a wide range of materials
• Regular length geometry keeps tool overhang minimal for rigidity
• Not center-cutting — not intended for direct plunge entry into solid material

Compatibility

Designed for use in standard 3/8 inch collets or end mill holders on vertical machining centers, CNC mills, and manual knee mills requiring a 0.5 inch diameter square end mill with a 3/8 inch reduced shank.

Installation Notes

Installation is performed by machinists following standard tool-holding procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing any end mill. Seat the shank fully into the collet or holder to the recommended engagement depth and torque the retention nut according to the toolholder manufacturer specifications. This tool is not center-cutting and must not be used for direct plunge milling into solid stock without a pre-drilled entry hole.