Dumont Minute Man 55553 Keyseating Broach Style Af

Product Description

The DUMONT MINUTE MAN 55553 is a Style AF keyseating broach designed for cutting keyways in bores, hubs, and pulleys. It features a 5/32 inch body width and an overall length of 16 inches, making it suited for reaching deep into workpieces during keyseating operations. The 3/8 inch tooth pitch and 1/2 inch maximum height at teeth support controlled, repeatable material removal on standard keyway profiles. The uncoated finish is appropriate for general-purpose keyseating in steel, cast iron, and similar materials. Machinists and toolroom professionals install this broach in keyseating machines for production and maintenance applications.

This broach is used in horizontal or vertical keyseating machines wherever a 5/32 inch keyway must be cut to accommodate standard keys. Typical applications include gear hubs, sprocket bores, coupling hubs, and pulley bores in both production shop and maintenance environments. The Style AF designation indicates a specific shank and body geometry matched to compatible keyseating machine tool holders.

Key Features

• 5/32 inch keyway width matches standard 5/32 inch key stock dimensions
• 16 inch overall length allows reach into deeper bores and longer workpieces
• 3/8 inch tooth pitch provides consistent chip load and controlled cutting action
• 1/2 inch maximum height at teeth accommodates standard keyway depth requirements
• Uncoated finish for general-purpose keyseating in ferrous and non-ferrous materials
• Style AF shank geometry for use in compatible keyseating machine holders

Compatibility

Designed for use in keyseating machines that accept Style AF broach holders. Verify machine tool holder specifications before installation to confirm fitment.

Installation Notes

Keyseating broaches are installed by qualified machinists in keyseating machines with the appropriate Style AF holder. Secure the workpiece firmly before beginning the cut, and ensure the machine is fully de-energized and locked out before changing or adjusting the broach. Use cutting fluid appropriate for the workpiece material to extend tool life and maintain surface finish. Inspect the broach for chipped or worn teeth before each use.