Hertel E299914041 Square End Mill 1-3/8 in 6 Flute Cobalt

Product Description

The HERTEL E299914041 is a cobalt square end mill designed for milling ferrous and difficult-to-machine materials in machining centers and manual mills. Built from M42 cobalt high-speed steel, it delivers thermal and wear resistance that outperforms standard HSS tooling in demanding cuts. The single-end, center-cutting design allows plunge entry, and the 30-degree spiral flute geometry promotes efficient chip evacuation. With a 1.375-inch cutting diameter and a 2-inch length of cut, this tool handles shoulder milling, slotting, and profiling operations requiring both depth and rigidity.

This end mill suits general-purpose and production machining in job shops, maintenance environments, and toolrooms. The right-hand cut and right-hand flute configuration matches standard spindle direction on most vertical and horizontal milling machines. The 0.75-inch shank diameter and 4.375-inch overall length make it a regular-length tool appropriate for setups where clearance is not a constraint. Six flutes provide a higher tooth count for improved surface finish at moderate feed rates. The uncoated finish makes it straightforward to resharpen on a tool grinder.

Key Features

• M42 cobalt construction for elevated heat and wear resistance versus standard M2 HSS
• Six-flute design improves surface finish and allows higher table feed rates
• Center-cutting geometry permits direct plunge entry without a pilot hole
• 30-degree helix angle promotes smooth chip flow and reduces cutting force
• Right-hand cut, right-hand flute configuration for standard spindle setups
• Uncoated finish allows conventional resharpening without coating removal concerns

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill for milling machines and machining centers accepting a 0.75-inch shank diameter.

Installation Notes

Installation is performed by machinists or toolroom personnel using an appropriate collet chuck, end mill holder, or milling arbor rated for the 0.75-inch shank. Confirm the spindle is fully stopped and the machine is in a safe, locked-out state before inserting or removing the tool. Verify runout with a dial indicator after clamping to minimize premature edge wear. Follow shop feed and speed tables for cobalt tooling when programming or setting manual feeds.