Hertel 87144630 Roughing End Mill 3/8 in 4 Flute Cobalt

Product Description

The HERTEL 87144630 is a single-end roughing end mill engineered for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it carries a TiCN coating that extends cutting edge life under high heat and abrasion. The tool measures 0.375 inches in diameter with a 0.75-inch length of cut and a 2.5-inch overall length. Four flutes with a right-hand cutting and right-hand flute direction make it suitable for conventional roughing passes on ferrous and non-ferrous materials. Machinists and tool-and-die professionals rely on this geometry for fast stock removal before finishing passes.

This roughing end mill is designed for use in vertical and horizontal milling machines, CNC machining centers, and manual knee mills. It is well suited to roughing operations on carbon steel, alloy steel, stainless steel, and similar materials where cobalt tooling provides an advantage over standard HSS. The 3/8-inch shank diameter matches standard ER and straight-bore collet systems commonly found in production and job-shop environments. Regular length geometry fits the majority of general-purpose roughing applications without requiring extended-reach setups.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard M2 HSS
• TiCN coating reduces friction and extends tool life on ferrous materials
• 4-flute, right-hand cut configuration optimized for roughing passes
• Non-centercutting design — requires a pre-drilled or pre-bored entry point
• Regular length geometry suits the majority of general-purpose milling setups
• 3/8-inch shank diameter fits standard collet and end mill holder tooling

Compatibility

Designed as a direct-fit replacement-style roughing end mill for any milling setup accepting a 3/8-inch straight shank tool, including ER16, ER20, and similar collet systems as well as standard end mill holders.

Installation Notes

Installation is performed by a machinist or tooling technician. Always power down and lock out the machine spindle before changing tooling. Verify collet or holder runout before engaging a cut, as excessive runout accelerates edge wear on cobalt tooling. This tool is non-centercutting and must not be plunged directly into solid material — use a ramping, helical, or pre-bored entry strategy.