Hertel 91192294 Roughing End Mill 1 in 3 Flute Cobalt M42

Product Description

The HERTEL 91192294 is a single-end cobalt roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, this end mill handles tough ferrous and non-ferrous materials with a coarse-pitch, 3-flute geometry that clears chips efficiently during heavy cuts. It measures 1 inch in diameter with a 4-inch length of cut and a 6.5-inch overall length, making it well-suited for deep-reach roughing passes. Installed by machinists and tooling professionals, it is a go-to choice when high heat resistance and edge toughness are required.

This end mill is used in vertical and horizontal milling machines, CNC machining centers, and manual knee mills for roughing passes on steel, stainless, cast iron, and other demanding workpiece materials. The coarse pitch removes large amounts of material per pass, reducing cycle time in production and job-shop environments. The 1-inch shank diameter ensures secure toolholder engagement. It is center-cutting, allowing plunge entry into the workpiece. The right-hand cutting and right-hand flute direction are standard for conventional and climb milling setups.

Key Features

• M42 cobalt HSS construction for heat resistance and edge retention in hard materials
• Coarse-pitch, 3-flute roughing geometry for high chip load and fast material removal
• Center-cutting design permits direct plunge entry without a pre-drilled pilot hole
• 1-inch shank diameter matches 1-inch collet chucks and end mill holders
• Right-hand cut and right-hand flute direction for standard spindle compatibility
• Bright, uncoated finish suitable for use with cutting fluid in a wide range of materials

Compatibility

Designed as a standard 1-inch shank roughing end mill compatible with milling machines and machining centers that accept 1-inch end mill holders, collet chucks, or shell mill arbors configured for straight-shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the holder to the minimum insertion depth recommended by the holder manufacturer, and torque set screws or collet nuts to the holder specification. Inspect the cutting edges for chips or damage before each use, and apply appropriate cutting fluid for the workpiece material.