Hertel E2111016 Ball End Mill 0.25 in 2 Flute Cobalt

Product Description

The HERTEL E2111016 is a cobalt ball end mill designed for milling contoured surfaces, slots, and complex 3D profiles in a wide range of metalworking applications. The 0.25-inch diameter cutting head features two flutes in a right-hand spiral configuration with a 30-degree helix angle, promoting efficient chip evacuation and smooth cutting action. Built from M42 cobalt high-speed steel, this end mill delivers solid performance in tough materials where standard HSS tooling falls short. The uncoated finish keeps the tool ready for use as delivered. A 3/8-inch shank diameter and single-end construction make it compatible with standard collet chucks and end mill holders found on most vertical mills and machining centers.

This end mill suits job shops, tool rooms, and production environments where machinists need reliable ball nose geometry for finishing passes on contoured workpieces. The 0.625-inch length of cut and 1.5-inch extended reach allow access to deeper pockets and stepped features without excessive overhang. The 3-1/16-inch overall length fits standard tool lengths for most knee mills, CNC vertical machining centers, and manual milling setups. Right-hand cutting direction is standard for conventional and climb milling on these platforms.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS in tough alloys
• Ball nose geometry for 3D contouring, profiling, and finishing passes
• 30-degree right-hand spiral flutes promote chip evacuation and reduce cutting forces
• Extended reach of 1.5 inches provides access to deeper features
• Uncoated finish suitable for use with cutting fluids across a range of workpiece materials
• Single-end design with 3/8-inch shank for direct chuck or collet mounting

Compatibility

Designed as a standard single-end ball nose end mill with a 3/8-inch shank, compatible with collet chucks and end mill holders sized for 3/8-inch shanks on vertical mills and CNC machining centers.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the 3/8-inch shank fully into a matched collet or end mill holder and tighten to the machine manufacturer's specified torque before operation. Ensure spindle and machine power are completely off and locked out before changing tooling. Inspect the cutting edges and shank for damage before each use and do not exceed the tool's rated depth of cut or feed rate for the workpiece material.