Hertel E211201601 Ball End Mill 1/4 in 2 Flute Hss Double End

Product Description

The HERTEL E211201601 is a double-end ball end mill designed for milling contoured surfaces, slots, and profiling operations in a wide range of materials. Manufactured from M7 high speed steel with a bright, uncoated finish, it features a 1/4 inch cutting diameter, a 1/2 inch length of cut, and a 30-degree right-hand spiral helix. The double-end configuration provides two usable cutting ends, extending tool life between changes. With a 3/8 inch shank diameter and a 3-1/8 inch overall length, this end mill mounts in standard collet and end mill holders found on most knee mills, CNC machining centers, and manual milling machines. Installation and use are appropriate for machinists and toolroom personnel.

This end mill suits general-purpose milling applications in job shops, tool rooms, and production environments. The ball-end geometry makes it well suited for profiling, die work, and finishing passes on curved or contoured workpiece surfaces. The right-hand cutting direction is compatible with conventional CNC and manual vertical milling setups. The standard length and 3/8 inch shank fit common toolholding systems without the need for extended-reach adapters.

Key Features

• Double-end design provides two cutting ends from a single tool
• M7 high speed steel construction for toughness in interrupted and general milling cuts
• 30-degree right-hand spiral helix promotes smooth chip evacuation
• Bright, uncoated finish suitable for use with or without cutting fluid
• Ball-end geometry for profiling, contouring, and die work
• Standard length and shank size for broad toolholder compatibility

Compatibility

Designed as an OEM-style replacement or direct-use ball end mill for standard 3/8 inch collet chucks and end mill holders used on vertical knee mills and CNC machining centers.

Installation Notes

Install and remove end mills only with the machine spindle fully stopped and locked out per OSHA and shop lockout/tagout procedures. Seat the 3/8 inch shank fully into the toolholder and tighten the collet or set screw to the toolholder manufacturer's specification. Inspect both cutting ends for chipping before use. A qualified machinist should verify spindle speed and feed rate against material requirements before beginning a cut.