Hertel E2051008 Square End Mill 1/8 in 4 Flute Cobalt

Product Description

The HERTEL E2051008 is a cobalt square end mill designed for precision milling operations in metal fabrication and machining environments. Built from M42 cobalt high-speed steel, this double-end tool offers a 1/8 inch cutting diameter with a 3/8 inch length of cut and a 30-degree helix angle for efficient chip evacuation. The 4-flute spiral configuration supports smooth cutting action in ferrous and non-ferrous materials. With a 3/8 inch shank diameter and a 3-1/16 inch overall length, it mounts securely in standard end mill holders. This tool is installed and used by machinists, toolroom operators, and CNC programmers in production and job-shop environments.

This end mill is suited for slot milling, peripheral milling, and profiling operations on materials that respond well to cobalt tooling, including alloy steels, stainless steels, and hardened materials. The uncoated M42 substrate provides toughness and heat resistance without the brittleness of carbide, making it a practical choice for interrupted cuts and manual machines as well as CNC machining centers. The right-hand cut and right-hand flute orientation are standard for conventional vertical and horizontal milling setups. Its regular length classification keeps deflection low when working at this diameter.

Key Features

• M42 cobalt high-speed steel construction for heat and wear resistance
• Double-end design extends usable tool life
• 4 spiral flutes with 30-degree helix angle for efficient chip flow
• Right-hand cut and right-hand flute orientation for standard milling setups
• Uncoated finish suitable for re-sharpening and use with cutting fluids
• Regular length classification minimizes deflection at 1/8 inch diameter

Compatibility

Designed as a standard replacement or stock end mill for use in any 3/8 inch end mill holder or collet chuck accepting a 3/8 inch shank diameter, compatible with manual mills and CNC machining centers.

Installation Notes

Installation is performed by a machinist or CNC operator using an appropriate end mill holder, collet, or Weldon shank holder rated for a 3/8 inch shank. Ensure the machine spindle is fully stopped and locked before inserting or removing the tool. Confirm holder runout is within acceptable limits at this diameter to prevent premature tool wear or breakage. Follow shop-standard feeds and speeds for M42 cobalt tooling in the material being cut.