Hertel 41120866 Roughing End Mill 1 in 5 Flute Cobalt

Product Description

The HERTEL 41120866 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, this tool handles tough ferrous and non-ferrous materials where standard HSS tools fall short. The 1-inch cutting diameter pairs with a fine-pitch, 5-flute geometry to produce a smooth surface finish while maintaining fast stock removal rates. With a 3-inch length of cut and a 5.5-inch overall length, this tool suits deep-pocket and shoulder milling work on vertical and horizontal machining centers.

This roughing end mill is intended for use in production machining and tool-room environments. The right-hand cutting and right-hand flute direction are standard for most CNC and manual milling setups. The center-cutting design allows plunge entry without a pre-drilled hole. Fine-pitch flute spacing reduces chatter on medium to hard materials. Machinists and tool-and-die professionals working with alloy steels, stainless, and similar materials will find this tool well suited to roughing passes before finish milling.

Key Features

• M42 cobalt HSS construction for heat and wear resistance in tough alloy cutting
• 5-flute fine-pitch design balances chip evacuation with surface finish quality
• Center-cutting geometry allows direct plunge entry
• Right-hand cut and right-hand helix for standard milling spindle use
• Bright uncoated finish suitable for use with cutting fluid on a wide range of materials
• Regular length profile with 1-inch shank diameter matches standard collet and end mill holder sizes

Compatibility

Designed as an OEM-style replacement or direct-use roughing end mill for standard 1-inch bore end mill holders, collet chucks, and side-lock holders on vertical machining centers, horizontal mills, and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the holder to the minimum engagement depth recommended by the holder manufacturer. Verify runout with a dial indicator before beginning a cut to avoid premature tool wear or chipping.