Hertel 91192393 Roughing End Mill 2 in 3 Flute Cobalt M42

Product Description

The HERTEL 91192393 is a single-end cobalt roughing end mill designed for aggressive material removal on milling machines and machining centers. Built from M42 cobalt high-speed steel, it delivers strong heat resistance and edge retention when cutting ferrous metals, stainless steels, and other tough alloys. The coarse-pitch, 3-flute geometry produces a high chip load per tooth, allowing faster feed rates while keeping chip evacuation efficient. With a 2-inch cutting diameter, 0.75-inch length of cut, and a 3-inch overall length, this tool suits heavy roughing passes where stock removal rate takes priority over surface finish. The bright, uncoated finish is standard for cobalt tools used across a broad range of workpiece materials.

This end mill is intended for use in production and job-shop environments where roughing operations precede finish milling. It is well suited for face milling, slot roughing, and peripheral roughing cuts in ferrous and non-ferrous workpiece materials. The 0.75-inch shank diameter is compatible with standard ER, Weldon, and collet-style toolholders commonly found on vertical and horizontal milling setups. Right-hand cut and right-hand flute direction make it a direct fit for conventional CNC and manual milling spindles. Center-cutting capability allows plunge entry without a pre-drilled pilot hole.

Key Features

• M42 cobalt HSS construction for elevated heat resistance and edge toughness in hard and abrasive materials
• Coarse-pitch, 3-flute roughing geometry maximizes chip load and material removal rate
• Center-cutting design permits direct plunge milling without a pilot hole
• Right-hand cut and right-hand flute direction for standard CNC and manual milling spindles
• Bright, uncoated finish suitable for a broad range of ferrous and non-ferrous materials
• 0.75-inch shank diameter fits standard ER, Weldon, and collet toolholders

Compatibility

Designed as an OEM-style roughing end mill for use in standard milling machines and CNC machining centers accepting a 0.75-inch shank diameter toolholder.

Installation Notes

Installation is performed by a machinist or tooling technician. Ensure the milling spindle is fully powered down and at rest before inserting or removing the tool from the holder. Secure the shank fully within the toolholder to the minimum engagement depth recommended by the holder manufacturer, and verify runout with a dial indicator before beginning a cut. Do not exceed the depth-of-cut or feed-rate parameters established during process planning for the specific workpiece material.