Hertel 91192187 Roughing End Mill 5/8 in 3 Flute Cobalt

Product Description

The HERTEL 91192187 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, it delivers the heat and wear resistance needed for tougher ferrous and non-ferrous workpiece materials. The cutter measures 0.625 inches in diameter with a 1.625-inch length of cut and a 3.75-inch overall length. Three flutes and a right-hand cutting and flute direction provide efficient chip evacuation during roughing passes. Center-cutting capability allows plunge entry directly into the workpiece. This tool is installed and used by machinists and tool-and-die professionals on manual and CNC milling machines.

This end mill is suited for roughing operations on steel, stainless steel, cast iron, and similar materials where high metal removal rates are the priority. The 5/8-inch shank diameter matches standard milling collets and end mill holders found in most shop environments. It is a single-end tool, meaning the cutting geometry is on one end only. Typical applications include slotting, profiling, and pocket roughing passes prior to a finish cut. The M42 cobalt grade makes it a practical choice when cutting harder alloys or when additional heat resistance is required over standard M2 high-speed steel tooling.

Key Features

• M42 cobalt high-speed steel construction for improved heat and wear resistance
• Three right-hand flutes for efficient chip evacuation during heavy roughing cuts
• Center-cutting design allows direct plunge entry into the workpiece
• Bright, uncoated finish suitable for general-purpose roughing applications
• Matching 5/8-inch mill diameter and shank diameter for straightforward toolholder setup
• Single-end configuration with right-hand cutting direction

Compatibility

Designed as a standard-fitment roughing end mill for use in 5/8-inch collets, end mill holders, or side-lock holders on manual knee mills and CNC machining centers.

Installation Notes

Installation is performed by machinists using standard end mill holders or collet chucks rated for the 5/8-inch shank diameter. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify runout at the shank with a dial indicator after seating the tool; excessive runout will reduce tool life and surface finish quality on roughing passes. Follow machine tool manufacturer torque specifications for the holder style in use.