Hertel E2031908 Square End Mill 3/4 in 4 Flute Cobalt

Product Description

The HERTEL E2031908 is a cobalt square end mill designed for milling operations requiring durability and heat resistance. Built from M42 cobalt high-speed steel, this single-end tool features a 0.75-inch mill diameter, four spiral flutes, and a 30-degree helix angle. The bright, uncoated finish suits applications where coating is not required or where post-machining treatments will be applied. Machinists and toolroom operators use this end mill for slotting, peripheral milling, and profile work on ferrous and non-ferrous materials. It is a right-hand cutting, right-hand flute tool in a standard regular-length configuration.

This end mill is suited for use in vertical machining centers, knee mills, and manual milling machines across production and toolroom environments. The 0.5-inch shank diameter fits standard ER collet chucks, end mill holders, and Weldon-style tool holders common in shop environments. The 1.625-inch length of cut accommodates typical slotting and side milling passes in ferrous metals, stainless steel, and high-temperature alloys where cobalt tooling is preferred over standard HSS. It is not center-cutting and should not be used for plunge operations directly into solid material.

Key Features

• M42 cobalt high-speed steel construction for improved heat and wear resistance over standard M2 HSS
• Four spiral flutes with a 30-degree right-hand helix for efficient chip evacuation
• Bright/uncoated finish — compatible with post-machining coatings or use as-is
• Right-hand cutting direction for standard spindle rotation
• Non-center-cutting geometry — suited for peripheral and slot milling, not direct plunge entry
• Regular length profile for rigid setups with minimal overhang

Compatibility

Designed for use in standard 0.5-inch end mill holders, ER collet systems, and Weldon-shank tool holders on vertical and horizontal milling machines. Fits any machine spindle accepting a 0.5-inch shank end mill.

Installation Notes

Installation and tool changes must be performed with the machine spindle stopped and locked. Ensure the tool holder is clean and free of chips or debris before seating the shank. A qualified machinist or CNC operator should verify runout with a dial indicator after clamping, as excessive runout reduces tool life and surface finish quality. Follow the machine manufacturer and tooling supplier feed and speed recommendations for the workpiece material.