Hertel 44839017 Roughing End Mill 1/4 in 3 Flute Cobalt

Product Description

The HERTEL 44839017 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a TiCN coating, it delivers heat and wear resistance suited to interrupted cuts and high-feed roughing passes. The 1/4 inch diameter cutter features 3 flutes with a coarse pitch geometry, which clears chips efficiently and reduces chatter during roughing. The 7/8 inch length of cut and 2-11/16 inch overall length make it well-suited for shallow-to-moderate depth passes in a vertical or horizontal milling setup. Machinists and toolroom professionals install this tool when rapid stock removal is the priority before a finishing pass.

This roughing end mill is used in metalworking applications where cobalt tooling is selected for its elevated red hardness compared to standard high-speed steel. The coarse pitch serrated edge geometry breaks chips into smaller segments, lowering cutting forces and allowing higher feed rates. It is appropriate for milling ferrous and non-ferrous metals in job shop, production, and maintenance machining environments. The 3/8 inch shank diameter fits standard collet chucks and end mill holders common in manual knee mills and CNC machining centers.

Key Features

• M42 cobalt construction for improved heat resistance over standard HSS
• TiCN coating extends tool life in abrasive and harder workpiece materials
• Coarse pitch, 3-flute design promotes chip evacuation and reduces cutting forces
• Right-hand cut and right-hand flute direction for conventional milling setups
• Single-end configuration with a 3/8 inch shank for standard toolholding
• Not center-cutting — requires a pre-drilled or pre-bored entry point for plunge applications

Compatibility

Designed as an OEM-style replacement or direct substitute for 1/4 inch roughing end mills used in standard collet chucks and end mill holders accepting a 3/8 inch shank diameter.

Installation Notes

This tool is installed by machinists in milling machines, CNC machining centers, or manual knee mills. Power down and lock out the spindle before changing tooling. Secure the shank fully within the collet or end mill holder to the recommended engagement depth per the holder manufacturer. This tool is not center-cutting and must not be used for direct plunge entry into solid material.