Hertel 06821995 Roughing End Mill 3/8 in 4 Flute Cobalt

Product Description

The HERTEL 06821995 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel and finished with a Titanium Nitride (TiN) coating, this tool delivers improved hardness and heat resistance compared to standard HSS tooling. The 3/8-inch diameter, 4-flute configuration is suited for roughing passes on ferrous metals, stainless steels, and high-temperature alloys. With a 3/4-inch length of cut and a 2.5-inch overall length, it fits standard tool holders used in vertical and horizontal milling setups. Right-hand cut and right-hand flute direction are standard for conventional milling machine spindles.

This end mill is used in job shops, production machining environments, and maintenance shops where medium-sized roughing cuts are required. The regular-length geometry makes it a practical choice for general-purpose milling on mills, machining centers, and CNC knee mills. It is typically installed by machinists and tool-and-die professionals working with steel, cast iron, and similar ferrous workpiece materials. The TiN coating helps extend tool life in interrupted cuts and moderate-speed applications.

Key Features

• M42 cobalt HSS construction for superior heat and wear resistance over standard M2 HSS
• Titanium Nitride (TiN) coating extends tool life and reduces friction at the cutting edge
• 4-flute design provides a good balance of chip evacuation and surface finish on roughing passes
• 3/8-inch shank diameter matches the mill diameter for direct collet or end mill holder mounting
• Right-hand cut and right-hand flute direction compatible with standard milling spindle rotation
• Regular overall length of 2.5 inches suits general-purpose milling depth requirements

Compatibility

Designed as an OEM-style replacement or standard tooling option for 3/8-inch end mill holders, collet chucks, and ER-style collets used on vertical mills, knee mills, and CNC machining centers.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the collet or end mill holder and torque the retention hardware per the tool holder manufacturer's specifications. Verify runout with a dial indicator before commencing cuts, as excessive runout accelerates tool wear and reduces surface quality.