Hertel E2041048 Cobalt Square End Mill 3/4 in 4 Flute

Product Description

The HERTEL E2041048 is a cobalt square end mill designed for demanding milling operations in ferrous and hard materials. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention under heavy-duty cutting conditions. The 3/4 inch diameter, four-flute design with a 30-degree right-hand helix promotes efficient chip evacuation and smooth surface finishes. With a 4 inch length of cut and 6.25 inch overall length, this is an extra-long configuration suited for deep-pocket and extended-reach milling work. It is center-cutting, allowing direct plunge entry. Licensed machinists and CNC operators are the primary users of this tool.

This end mill is used in ferrous metal machining applications where extended reach into deep cavities or pockets is required. The extra-long length of cut, at 4 inches, accommodates workpiece geometries that standard-length end mills cannot reach. The bright uncoated finish makes it well suited for applications where coolant compatibility or post-processing is a consideration. Typical installations include manual knee mills, vertical machining centers, and CNC milling machines in job shop and production environments.

Key Features

• M42 cobalt HSS construction for superior heat and wear resistance in hard materials
• 4 inch length of cut in an extra-long configuration for deep-pocket milling
• 4 flutes with right-hand spiral flute direction for efficient chip removal
• 30-degree helix angle balances cutting forces and surface finish quality
• Center-cutting design allows direct plunge milling without pre-drilling
• Bright uncoated finish compatible with a wide range of cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill for 3/4 inch collet or end mill holders in vertical milling machines and CNC machining centers.

Installation Notes

Installation is performed by qualified machinists following standard toolroom procedures. Power down and lock out the spindle before changing tooling. Ensure the shank is fully seated and secured in the tool holder to the correct clamping torque per the holder manufacturer specifications. Inspect the collet or end mill holder for wear before mounting this or any end mill.