Hertel 44839272 Roughing End Mill 1/2 in 4 Flute Cobalt

Product Description

The HERTEL 44839272 is a single-end roughing end mill designed for aggressive material removal in milling operations. Manufactured from M42 cobalt high-speed steel with a bright, uncoated finish, this tool handles tough ferrous and non-ferrous materials without coating interference. The 1/2 inch diameter, 4-flute configuration with a coarse pitch geometry breaks up chips quickly and reduces cutting forces on the workpiece. With a 3-inch length of cut and 5-inch overall length, it provides reach for deeper pocketing and slotting passes. Center-cutting capability allows plunge entry directly into the workpiece. Right-hand cutting and right-hand flute direction are standard for conventional vertical and horizontal milling setups.

This roughing end mill is suited for production and job-shop milling on knee mills, vertical machining centers, and CNC mills. It is used by machinists taking heavy roughing passes in steel, stainless, cast iron, and high-temperature alloys where cobalt tooling outperforms standard high-speed steel. The coarse pitch serrated edge design reduces chatter and allows higher feed rates compared to standard end mills, making it appropriate for roughing prior to a finish pass. The 1/2 inch shank diameter fits standard ER collet chucks, end mill holders, and Weldon-style holders common in most shops.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS
• Coarse pitch roughing geometry reduces cutting forces and breaks chips efficiently
• Center-cutting design allows direct plunge milling without pre-drilling
• Bright, uncoated finish suitable for use with cutting fluids and oils
• Right-hand cut, right-hand flute for standard milling spindle direction
• 1/2 inch shank diameter with tight tolerance for secure tool holding

Compatibility

Designed as an OEM-style replacement or direct-use roughing end mill compatible with standard 1/2 inch end mill holders, ER collet chucks, and Weldon shank tool holders used on vertical and horizontal milling machines.

Installation Notes

Installation is performed by a machinist or toolroom technician. Secure the shank fully within the tool holder to the recommended gauge line before tightening to prevent pullout under load. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Verify runout with a dial indicator after mounting to maintain dimensional accuracy on the workpiece.