Hertel E111101601 Ball End Mill 0.25 in 2 Flute Hss

Product Description

The HERTEL E111101601 is a single-end ball end mill designed for milling curved profiles, contoured surfaces, and complex 3D geometry on CNC machining centers and manual mills. Built from high speed steel (HSS), this tool features a 0.25 inch cutting diameter and a 38-degree helix angle, which promotes efficient chip evacuation and smooth cutting action in a wide range of ferrous and non-ferrous materials. The uncoated HSS construction makes it well-suited for lower-speed applications and easy to resharpen. It is installed and applied by machinists and tool-and-die professionals across job shop, production, and maintenance environments.

This end mill is appropriate for light-to-medium slot milling, profiling, and contour work in steel, aluminum, brass, and plastics. The long flute length of 1.25 inches provides reach for deeper cut passes without excessive tool deflection. The 0.375 inch shank diameter fits standard ER and straight-bore collet chucks common in vertical machining centers and manual knee mills. Right-hand cut and right-hand flute direction are standard for conventional CNC and manual mill setups.

Key Features

• 0.25 inch ball nose cutting diameter for profiling and contour work
• 1.25 inch length of cut (LOC) for deep profile passes
• 38-degree right-hand helix for efficient chip flow
• High speed steel construction — resharpenable and cost-effective for general-purpose use
• Uncoated finish suitable for lower-speed machining and materials sensitive to coating interaction
• Single-end design with 0.375 inch shank for secure collet retention

Compatibility

Designed as a standard single-end ball end mill with a 0.375 inch straight shank, compatible with ER collet chucks, straight-bore tool holders, and standard vertical mill spindles accepting 3/8 inch shank tooling.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in a safe state. Secure the shank to the full recommended grip depth in the collet or tool holder to minimize runout and tool pull-out risk. Inspect the collet and chuck bore for wear or contamination before seating the tool. Follow the tool manufacturer and machine builder guidelines for appropriate feed rates and speeds when setting up HSS tooling.