Hertel 91192484 Roughing End Mill 11/16 in 4 Flute Cobalt

Product Description

The HERTEL 91192484 is a single-end cobalt roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention when cutting ferrous metals, stainless, and hard alloys. The mill measures 0.6875 inches in diameter with a 1.625-inch length of cut and a 3.75-inch overall length. The coarse-pitch, 4-flute geometry is optimized for high chip load rates, making it well suited for roughing passes where stock removal rate matters more than finish quality. Machinists and tool-and-die professionals are the primary users of this tool.

This end mill is used in vertical and horizontal milling machines, CNC machining centers, and manual knee mills for roughing operations on ferrous and non-ferrous materials. The bright, uncoated finish makes it a straightforward choice for general-purpose roughing where coatings are not required. The right-hand cut and right-hand flute direction are standard for conventional and climb milling setups. The 0.625-inch shank diameter fits standard R8, CAT, BT, and direct-mount collet systems common in job shop and production environments.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS
• Coarse pitch, 4-flute design maximizes chip evacuation during roughing passes
• Bright uncoated finish suitable for general-purpose ferrous and non-ferrous milling
• Right-hand cut and right-hand flute direction for standard milling setups
• Single-end configuration with 0.625-inch shank for broad collet compatibility
• Not center-cutting — requires a pre-drilled hole or side entry for plunge-style applications

Compatibility

Designed as an OEM-style roughing end mill for use in standard milling machines and CNC machining centers accepting a 0.625-inch shank diameter.

Installation Notes

Installation is performed by machinists using appropriate collet chucks or end mill holders rated for the 0.625-inch shank. Power down and lock out the machine spindle before changing tooling. This end mill is not center-cutting and should not be used for direct plunge entry — side ramping or pre-drilled entry is required. Ensure the holder is clean and the set screw or collet is torqued per the machine manufacturer specification before beginning the cut.