Hertel E4042048 Square End Mill 3/4 in 6 Flute Cobalt

Product Description

The HERTEL E4042048 is a cobalt square end mill designed for metal cutting operations in demanding machining environments. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention when cutting alloy steels, stainless, and hardened materials. The 6-flute geometry provides a higher feed rate capability and improved surface finish compared to lower flute-count mills. A 30-degree helix angle aids chip evacuation and reduces cutting forces. The TiN (Titanium Nitride) coating adds surface hardness and lubricity, extending tool life in production runs. This is a single-end, right-hand cut, right-hand spiral tool suited for milling, slotting, and peripheral cutting applications.

This end mill fits standard CNC machining centers, vertical mills, and knee mills used in job shops, tool rooms, and production environments. The 3/4 inch diameter and 1-5/8 inch length of cut make it appropriate for moderate-depth slotting and profiling on ferrous and non-ferrous workpieces. The regular-length designation suits general-purpose setups where extended reach is not required. Machinists and CNC operators working in industrial, aerospace, and general metalworking settings will find this tool appropriate for roughing and semi-finishing passes.

Key Features

• M42 cobalt HSS construction for heat and wear resistance
• 6 flutes for improved feed rates and surface finish
• TiN coating increases surface hardness and reduces friction
• 30-degree right-hand spiral helix for efficient chip evacuation
• Center-cutting capable — suitable for plunge entry
• Single-end design with 3/4 inch straight shank

Compatibility

Designed as a standard 3/4 inch shank square end mill compatible with ER collets, end mill holders, and other 3/4 inch bore toolholding systems on CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the toolholder bore is clean and free of chips before seating the shank, and verify runout with a dial indicator before production. Minimum shank engagement depth should follow the toolholder manufacturer guidelines. Confirm spindle speed and feed rate are appropriate for workpiece material and depth of cut before engaging the cutter.