Hertel E299914049 Square End Mill 1 in 4 Flute Cobalt

Product Description

The HERTEL E299914049 is a cobalt square end mill designed for milling operations in ferrous and difficult-to-machine materials. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention in demanding cutting environments. The 1-inch diameter cutter features four spiral flutes with a 30-degree helix angle, providing efficient chip evacuation and smooth cutting action. At 4.125 inches overall length with a 1.875-inch length of cut, this end mill handles slot milling, profiling, and peripheral milling in standard-reach setups. It ships uncoated and is suited for machinists and toolroom professionals working on manual or CNC mills.

This end mill is used in general machining applications including ferrous metals, alloy steels, and other materials where cobalt tooling is specified over carbide due to toughness and shock resistance. The centercutting geometry allows direct plunge entry without pre-drilling. Right-hand cut and right-hand flute configuration is standard for conventional vertical and horizontal milling setups. The 0.5-inch shank diameter fits a wide range of standard end mill holders, collet chucks, and milling machine spindles.

Key Features

• M42 cobalt HSS construction for heat and wear resistance in tough materials
• Four spiral flutes with 30-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge milling without pilot drilling
• Uncoated finish suitable for re-sharpening and general-purpose use
• Right-hand cut and right-hand flute for standard milling machine setups
• Regular length geometry for rigid setups and close-tolerance work

Compatibility

Designed as a standard square end mill fitting 0.5-inch end mill holders, collet chucks, and milling machine spindles that accept a 0.5-inch shank diameter.

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 from the holder. Use a properly sized collet or end mill holder torqued to the toolholder manufacturer's specification to prevent pullout during cutting. Inspect the cutting edges for chips or wear before each use; cobalt end mills can be resharpened by a qualified tool grinding service.