Hertel 91192286 Roughing End Mill 1 in 3 Flute Cobalt

Product Description

The HERTEL 91192286 is a single-end cobalt roughing end mill designed for aggressive material removal on milling machines and machining centers. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it handles tough ferrous and non-ferrous workpieces where heat resistance and edge retention are priorities. The 1-inch diameter cutter features 3 flutes with a coarse pitch geometry, producing a chatter-reducing cut action that clears chips efficiently in heavy roughing passes. The 3-inch length of cut and 5.5-inch overall length make it well-suited for moderate-depth cavity and profile work. Machinists and tool-and-die professionals reach for this style of end mill when cycle time matters more than surface finish.

This roughing end mill is intended for use in conventional vertical and horizontal milling setups, as well as CNC machining centers handling steel, alloy steel, and similar materials. The coarse-pitch flute geometry breaks up chips into smaller segments, reducing the load on the spindle during deep-pass roughing operations. The 1-inch shank diameter matches the cutter diameter directly, making tool holding straightforward with standard ER or side-lock holders in that bore size. It cuts in a right-hand direction with right-hand flutes and is center-cutting, so plunge entries are possible where required by the operation.

Key Features

• M42 cobalt HSS construction for elevated heat resistance and wear life in tough materials
• 3-flute coarse-pitch geometry reduces chip packing and spindle load during heavy roughing
• Center-cutting design allows plunge milling entries without a pre-drilled pilot
• Right-hand cut, right-hand helix matches the most common spindle and fixturing setups
• Bright, uncoated finish compatible with most cutting fluids and coolant strategies
• 1-inch shank diameter for direct, no-reduction tool holder fitment

Compatibility

Designed as a standard-shank roughing end mill for use in 1-inch bore milling tool holders, including ER collet chucks, side-lock holders, and hydraulic chucks on vertical mills and CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the tool holder to the recommended engagement depth and torque the retention mechanism per the holder manufacturer specifications. Verify runout with a dial indicator before starting a new operation, as excessive runout will accelerate edge wear on cobalt tooling.