Hertel 84511393 Roughing End Mill 1/4 in 4 Flute Cobalt

Product Description

The HERTEL 84511393 is a single-end roughing end mill designed for aggressive material removal in ferrous and non-ferrous metals. Built from M42 cobalt high-speed steel, it handles elevated cutting temperatures better than standard HSS tooling, making it well suited for interrupted cuts and harder workpiece materials. The coarse-pitch flute geometry reduces cutting forces and helps clear chips efficiently. With a 0.25-inch mill diameter, a 1.25-inch length of cut, and a 3/8-inch shank diameter, this tool fits a wide range of milling setups. It is center-cutting and right-hand cutting with a right-hand flute direction.

This roughing end mill is intended for milling operations where rapid stock removal is the priority before a finishing pass. It fits standard collets, end mill holders, and set-screw holders that accept a 3/8-inch shank. Typical applications include slotting, profiling, and peripheral milling in steel, stainless, and similar alloys on manual knee mills, CNC machining centers, and benchtop mills. The bright, uncoated finish makes it straightforward to inspect for wear and resharpen when needed.

Key Features

• M42 cobalt HSS construction for improved heat and wear resistance over standard HSS
• Coarse-pitch, 4-flute roughing geometry reduces cutting forces and improves chip evacuation
• Center-cutting design allows plunge entry into the workpiece
• Right-hand cut and right-hand flute direction for conventional spindle use
• Bright, uncoated finish — resharpenable and easy to inspect for wear
• Single-end configuration with 3/8-inch straight shank

Compatibility

Designed as a standard single-end roughing end mill with a 3/8-inch shank, compatible with collet chucks, end mill holders, and set-screw holders sized for 3/8-inch shanks on vertical milling machines and CNC machining centers.

Installation Notes

Installation and tool changes must be performed by a qualified machinist with the spindle fully stopped and the machine in a locked-out, de-energized state per applicable machine guarding and OSHA lockout/tagout procedures. Confirm the holder bore matches the 3/8-inch shank diameter before clamping. Do not exceed the rated depth of cut or feed rates for the workpiece material. Inspect the cutting edges for chipping before each use and replace or resharpen worn tooling promptly.