Hertel E2053020 Square End Mill 5/16 in 4 Flute Cobalt

Product Description

The HERTEL E2053020 is a cobalt double-end square end mill designed for general-purpose milling of ferrous and non-ferrous metals. With a 5/16-inch cutting diameter, a 3/4-inch length of cut, and a 3/8-inch shank diameter, this tool fits standard milling chucks and collet holders commonly found in manual and CNC machining setups. The 4-flute spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and a smooth finish in a wide range of materials. At 3.5 inches overall length, it is suited for standard-reach operations without extended toolholders. Machinists and tool-and-die professionals install this end mill in vertical mills, knee mills, and machining centers.

This end mill is used in job shops, production machining, and maintenance repair operations where cobalt tooling is preferred over standard HSS for improved heat and wear resistance. The double-end design allows the tool to be reversed when one end reaches wear limits, extending usable tool life. The centercutting geometry allows direct plunge entry into workpiece material, supporting slot milling, profile milling, and ramping applications. Right-hand cut and right-hand flute configuration is standard for conventional spindle rotation.

Key Features

• Cobalt construction (M42 grade) for improved hardness and heat resistance over standard HSS
• Double-end design extends usable tool life by providing two cutting ends per tool
• 4-flute spiral configuration with 30-degree helix angle for smooth chip evacuation
• Centercutting geometry supports plunge, slot, and profile milling operations
• Right-hand cut and right-hand flute for standard spindle rotation
• Uncoated finish — ready for use with standard cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill compatible with 3/8-inch collet holders and milling chucks used in standard vertical and CNC milling applications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Secure the shank fully within the collet or chuck to the manufacturer-recommended engagement depth before tightening. Ensure the spindle is fully stopped and the machine is powered down before inserting or removing the tool. Follow applicable OSHA machine guarding and PPE requirements during setup and operation.