Hertel 91196568 Roughing End Mill 1/4 in 3 Flute Cobalt

Product Description

The HERTEL 91196568 is a single-end roughing end mill designed for aggressive material removal in ferrous and non-ferrous machining applications. Built from M42 cobalt high-speed steel with a TiCN coating, this tool handles demanding cuts where standard HSS end mills fall short. It features a 1/4 inch cutting diameter, three flutes, and a right-hand cutting and flute direction. The 5/8 inch length of cut and 3/8 inch shank diameter suit it for short-reach roughing passes in milling machines and machining centers. Machinists and tool-and-die professionals are the primary users of this style of end mill.

This roughing end mill is suited for use in vertical milling machines, CNC machining centers, and manual mills where high metal removal rates are the priority. The corncob-style roughing geometry breaks chips aggressively, reducing heat and cutting forces compared to a standard end mill. It is not center-cutting, so plunge operations are not supported. Typical applications include roughing steel, alloy steel, stainless, and similar hard materials in job shop, production, and maintenance-repair environments.

Key Features

• M42 cobalt HSS construction for heat and wear resistance in tough alloys
• TiCN coating extends tool life and reduces friction at the cutting edge
• Three-flute roughing geometry for high chip load and fast material removal
• Right-hand cut and right-hand helix for standard spindle use
• Single-end design with a 3/8 inch reduced shank for secure collet or end mill holder grip
• Not center-cutting — requires a pre-drilled or pre-bored entry point for pocket work

Compatibility

Designed as an OEM-style replacement or standard tooling selection for milling operations requiring a 1/4 inch diameter roughing end mill with a 3/8 inch shank in cobalt HSS construction.

Installation Notes

Installation is performed by qualified machinists following standard toolroom practices. Secure the 3/8 inch shank in a properly sized collet, end mill holder, or set-screw holder before use. Verify spindle speed and feed rate against published cobalt HSS cutting data for the workpiece material before engaging the cut. Always power down and lock out the spindle before changing or inspecting tooling.