Hertel E2050021 Square End Mill 21/64 in Cobalt 2 Flute

Product Description

The HERTEL E2050021 is a double-end cobalt square end mill designed for cutting ferrous and high-temperature alloy materials in milling operations. It features a 21/64 inch (0.3281 inch) mill diameter and a 9/16 inch (0.5625 inch) length of cut, making it well suited for slotting, profiling, and peripheral milling in tight workspaces. Constructed from M42 cobalt high-speed steel, this end mill delivers heat and wear resistance beyond standard HSS tooling. The bright, uncoated finish keeps the tool ready for use as delivered. It is installed and used by machinists, tool-and-die makers, and CNC operators working on manual or automated milling machines.

This end mill fits standard milling applications in job shops, maintenance machining, and production environments. The double-end design provides two usable cutting ends, extending tool life per unit. The 3/8 inch shank diameter is compatible with standard collet chucks and end mill holders used in vertical and horizontal milling machines. With a 30-degree helix angle and right-hand cutting and flute direction, it produces efficient chip evacuation on a wide range of materials including steel, stainless, and cast iron.

Key Features

• M42 cobalt construction for improved heat resistance over standard M2 HSS
• Double-end design provides two cutting ends per tool
• 30-degree helix angle promotes smooth chip flow and reduced chatter
• Center-cutting capable, allowing plunge entry into the workpiece
• Right-hand cut and right-hand spiral flute configuration
• Bright, uncoated finish suitable for use with cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill for standard 3/8 inch collet chucks and end mill holders on vertical and horizontal milling machines.

Installation Notes

Installation is performed by machinists using a standard collet chuck or end mill holder torqued per machine tool manufacturer specifications. Always power down and lock out the milling machine spindle before changing tooling. Inspect the shank and cutting edges for damage before seating in the holder. Use appropriate cutting fluid for the material being machined to maximize tool life.