Hertel E2021032 Ball End Mill 1/2 in 4 Flute Cobalt

Product Description

The HERTEL E2021032 is a single-end cobalt ball end mill designed for milling contoured surfaces, slots, and complex 3D profiles in a wide range of metallic workpiece materials. Built from M42 cobalt high-speed steel, it offers greater heat resistance and wear tolerance than standard M2 HSS tooling, making it well suited for harder ferrous materials and tougher alloys. The cutting diameter is 0.5 inches with a 2-inch length of cut, a 4-inch overall length, and a 0.5-inch straight shank. The bright, uncoated finish leaves the base cobalt geometry exposed for good chip evacuation and easy inspection after use.

This end mill is used in manual knee mills, CNC machining centers, and turret mills for profiling, contouring, and semi-finish milling operations. The 4-flute configuration provides a good balance of chip clearance and surface finish, making it appropriate for medium to finishing passes in steel, cast iron, stainless steel, and similar materials. Machinists and tool-and-die professionals installing this tool in production or job-shop environments will find the 30-degree right-hand spiral helix well suited to general-purpose interpolation and 3D contouring work.

Key Features

• M42 cobalt HSS construction for improved heat and wear resistance over standard HSS
• 4 right-hand spiral flutes with 30-degree helix angle for balanced cutting and chip flow
• Ball end geometry for 3D contouring, radii milling, and profiled slot work
• Bright/uncoated finish - no coating buildup to obscure wear or affect close-tolerance fits
• Single-end design with 0.5-inch straight shank for standard end mill holders and collet chucks
• 2-inch length of cut provides reach for deeper pocket and contour work

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for standard 1/2-inch end mill holders, ER collet chucks, and Weldon-shank tool holders used in vertical and horizontal milling machines.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom practices. Power down and lock out the spindle drive before inserting or removing the end mill from the holder. Ensure the shank is fully seated to the minimum insertion depth specified by the tool holder manufacturer before tightening. Inspect the cutting edges for chips or damage before each use, and verify proper speeds and feeds for the workpiece material before starting the cut.