Hertel 91193128 Roughing End Mill 7/16 in 4 Flute Cobalt

Product Description

The HERTEL 91193128 is a single-end roughing end mill designed for aggressive material removal in ferrous and non-ferrous metals. Manufactured from M42 cobalt high-speed steel and coated with titanium nitride (TiN), this tool delivers elevated hardness and heat resistance compared to standard HSS tooling. The 7/16 inch cutting diameter is paired with four right-hand, coarse-pitch flutes that break up chips along the cutting edge, reducing cutting forces and heat buildup during heavy roughing passes. Machinists and tool-and-die professionals reach for this style of end mill when stock removal rate matters more than surface finish.

This roughing end mill is suited for milling operations on mills, machining centers, and manual knee mills in job shop, maintenance, and production environments. The 1 inch length of cut and 2-11/16 inch overall length make it appropriate for shallow-to-moderate depth passes in steel, alloy steels, stainless, and similar materials. The center-cutting geometry allows plunge entry, expanding its range of use to slot milling and ramping operations without a pre-drilled pilot hole.

Key Features

• M42 cobalt HSS construction for improved red hardness and wear resistance over standard M2 HSS
• TiN coating extends tool life and reduces friction at the cutting edge
• Coarse-pitch flute design breaks chips and reduces cutting pressure during roughing
• Center-cutting capable — supports direct plunge entry and ramping
• Right-hand cut and right-hand flute spiral for use in conventional milling setups
• 3/8 inch straight shank fits standard ER, Weldon, and set-screw tool holders

Compatibility

Designed as an OEM-style roughing end mill for use in standard 3/8 inch end mill holders on manual mills and CNC machining centers requiring a 7/16 inch cobalt roughing tool.

Installation Notes

A licensed machinist or qualified shop technician should install and set this tool. Power down and lock out the spindle before loading or changing tooling. Secure the shank fully within the tool holder to the manufacturer-specified minimum engagement depth and verify runout before cutting. Inspect the cutting edges for chipping or wear before each use and replace the tool when surface finish or dimensional accuracy begins to degrade.