Hertel E2053015 Square End Mill 15/64 in 4 Flute Cobalt

Product Description

The HERTEL E2053015 is a double-end cobalt square end mill designed for general-purpose milling in metal fabrication and machining applications. Built from M42 cobalt high-speed steel, it delivers reliable performance on ferrous and non-ferrous materials where heat resistance matters. The mill features a 15/64 inch (0.2344 inch) cutting diameter, a 5/8 inch length of cut, and a 30-degree right-hand helix with four spiral flutes. The double-end configuration extends tool life by providing two usable cutting ends. It ships bright/uncoated with a 3/8 inch shank diameter and an overall length of 3-3/8 inches. Licensed machinists and tool-and-die professionals are the primary installers.

This end mill is suited for slot milling, profiling, and light pocketing operations on steel, stainless, cast iron, and similar materials. The center-cutting geometry allows direct plunge entry without a pre-drilled pilot hole, making it practical for both manual and CNC milling machines. The regular-length design keeps deflection low in tight setups. Typical applications include job shops, maintenance machining, and production environments that require a compact, small-diameter end mill with cobalt durability.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS
• Double-end design provides two cutting ends per tool, extending service life
• Center-cutting capable — allows direct plunge without a pilot hole
• 30-degree right-hand helix with four spiral flutes for efficient chip evacuation
• Bright/uncoated finish suitable for a wide range of general milling materials
• 3/8 inch shank diameter for compatibility with standard collet and end mill holders

Compatibility

Designed for use in standard end mill holders, collet chucks, and milling machine spindles accepting a 3/8 inch round shank. Suitable for manual knee mills and CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist following standard toolholding procedures. Ensure the milling machine spindle is fully stopped and locked out before inserting or removing the end mill. Seat the shank to the recommended engagement depth in the collet or holder — do not run with minimal shank engagement. Verify runout with a dial indicator before beginning a production cut.