Hertel E202001602 Ball End Mill 0.25in 4 Flute Hss

Product Description

The HERTEL E202001602 is a single-end ball end mill designed for milling contoured surfaces, slots, and complex 3D profiles in metal and similar materials. Built from M7 high speed steel, this tool features a 0.25 inch diameter ball nose, four flutes with a 30-degree right-hand spiral helix, and an uncoated finish. It delivers smooth cutting action on a wide range of ferrous and non-ferrous workpieces. The 0.625 inch length of cut and 2.5 inch overall length make it well suited for moderate-depth profiling operations on CNC machining centers and manual mills.

This end mill is intended for use in machine shop environments, tool and die work, mold making, and general-purpose metalworking applications. The 0.375 inch shank diameter fits standard ER and end mill holders commonly found in both vertical and horizontal milling setups. Machinists and tool and die makers working on finish passes, radius pockets, and contour work are the primary users of this geometry. The right-hand cutting direction is the standard orientation for conventional milling spindles.

Key Features

• Ball nose geometry for contouring, radius pockets, and 3D surface profiling
• M7 high speed steel construction for toughness across a range of workpiece materials
• Four flutes with a 30-degree right-hand helix for efficient chip evacuation
• 0.25 inch cutting diameter with 0.625 inch length of cut
• Uncoated finish suitable for use with cutting fluids or dry on softer materials
• Single-end design with 0.375 inch shank diameter for standard toolholder compatibility

Compatibility

Designed as a standard single-end ball end mill with a 0.375 inch shank diameter, compatible with ER collet chucks, end mill holders, and milling chucks sized for 3/8 inch shank tooling on CNC and manual milling machines.

Installation Notes

Installation and use should be performed by a qualified machinist or toolroom professional. Ensure the milling spindle is fully powered down and locked out before inserting or removing the end mill from its holder. Secure the shank to the recommended torque specification for the toolholder being used and verify runout before beginning a cut. Always consult the machine manufacturer and applicable shop safety standards when selecting speeds, feeds, and cutting fluids for the workpiece material.