Hertel E299921168 Square End Mill 7/16 in 4 Flute Cobalt

Product Description

The HERTEL E299921168 is a 4-flute cobalt square end mill designed for general-purpose milling in ferrous and tough alloy materials. It features a 7/16-inch cutting diameter with a 1-3/4-inch length of cut, a 3/8-inch shank diameter, and a 3-3/4-inch overall length. The 30-degree helix spiral flute geometry promotes efficient chip evacuation and smooth cutting action. This is an uncoated, single-end tool with right-hand cut and right-hand flute orientation. It is centercutting, making it capable of plunge operations. Machinists and tool-and-die professionals install this end mill in manual mills and CNC machining centers for slotting, profiling, and side milling applications.

This end mill is suited for use in ferrous metals, stainless steel, and high-temperature alloys where cobalt construction provides improved heat and wear resistance over standard high-speed steel. It fits standard 3/8-inch collets and end mill holders. Typical applications include slot milling, peripheral profiling, and light ramping operations in both manual and CNC environments. The centercutting design allows direct plunge entry without a pre-drilled hole, adding flexibility to the machining setup.

Key Features

• Cobalt construction for improved heat resistance and tool life in tough alloys
• 4-flute design balances chip clearance with surface finish quality
• 30-degree helix angle promotes smooth cutting and efficient chip flow
• Centercutting geometry allows direct plunge entry into workpiece
• Spiral flute, uncoated finish suitable for use with or without cutting fluid
• Right-hand cut and right-hand flute for standard spindle rotation

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill compatible with standard 3/8-inch collet chucks and end mill holders used in manual knee mills and CNC machining centers.

Installation Notes

This end mill is installed by a machinist or tooling technician into a 3/8-inch collet or end mill holder on a milling machine or machining center. Ensure the machine spindle is fully stopped and locked before changing tooling. Verify runout with a dial indicator after seating to prevent premature wear or chatter. Follow shop safety protocols and machine manufacturer guidelines for tool holding torque and speed-feed parameters appropriate to the workpiece material.