Dumont Minute Man 77713 Hexagon Broach 1/2 in Hss

Product Description

The DUMONT MINUTE MAN 77713 is a high speed steel hexagon broach designed to cut precise 1/2-inch hex openings in metal workpieces. The broach accepts a 1/2-inch pilot hole and provides a length of cut range from 1/2 inch to 1-3/8 inches, making it suitable for varying material thicknesses. Across-corners dimensions are held to a tight tolerance of 0.575 to 0.577 inches, with a minimum tolerance of 0.5005 inches and a maximum tolerance of 0.5015 inches. Overall length is 11-7/8 inches. Maximum pressure required for a full-length cut is 3,025 pounds. The uncoated HSS construction delivers durability across a range of ferrous and non-ferrous materials.

This broach is used in drive, fixture, jig, and hexagonal broaching operations across manufacturing, machining, and maintenance environments. It is suited for production and toolroom applications where repeatable, accurate hex bores are required. Typical users include machinists, tool and die makers, and maintenance technicians working with arbor presses or hydraulic broaching equipment. The 1/2-inch hex profile makes it a common choice for shaft fittings, coupling bores, and hex-socket applications.

Key Features

• 1/2-inch hex profile with tight across-corners tolerance of 0.575 to 0.577 inches
• Length of cut range: 1/2 inch to 1-3/8 inches for variable material thickness
• 1/2-inch pilot hole diameter for accurate broach alignment
• High speed steel (HSS) construction, uncoated
• Maximum cutting pressure: 3,025 pounds at full length of cut
• 9/32-inch pitch; 11-7/8-inch overall length

Compatibility

Designed for use in arbor press or hydraulic broaching setups requiring a 1/2-inch hex bore with a 1/2-inch pilot hole. Suitable for drive, fixture, jig, and hexagonal broaching operations as specified by the manufacturer.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians using an arbor press or hydraulic broaching machine rated to handle the required cutting pressure. Ensure the workpiece is securely fixtured and the pilot hole is properly sized and deburred before pressing the broach. Use appropriate cutting fluid to reduce heat and extend broach life. Never exceed the rated maximum pressure for the length of cut being performed.