Osborn 0003073400 End Brush 1/2 in Steel Knotted Wire

Product Description

The OSBORN 0003073400 is a knotted wire end brush designed for aggressive surface preparation, deburring, and cleaning on metal workpieces. Built with steel wire in the knotted configuration, it delivers more abrasive cutting action than crimped wire styles, making it well-suited for removing rust, scale, weld spatter, and heavy oxidation. The brush measures 0.5 inches in diameter and is rated to a maximum of 22,000 RPM. A shank is included for direct chuck mounting on die grinders and rotary tools. This brush is installed and used by machinists, welders, pipefitters, and general metal fabricators working in both shop and field environments.

The 0003073400 end brush is used in applications requiring concentrated wire action in tight bores, weld joints, pipe ends, and confined surface areas where larger wheel brushes cannot reach. It is suited for both light production and maintenance work on ferrous metal surfaces. The steel knotted wire construction handles demanding surface conditions without premature flaring or filament loss under load at rated speed.

Key Features

• Knotted steel wire fill for aggressive cutting action on rust, scale, and weld spatter
• 0.5 inch brush diameter for use in confined areas and small bores
• 22,000 RPM maximum speed rating compatible with standard die grinders
• Shank included for direct chuck mounting — no adapter required
• Wire diameter range of 0.0101 to 0.0200 inches provides a balance of stiffness and reach
• Non-piloted, non-bridled, non-encapsulated, and non-flared construction

Compatibility

Designed for use with die grinders and rotary tools accepting a standard shank mount. Confirm tool RPM rating meets or exceeds the brush maximum before use. Always verify shank size compatibility with the tool chuck prior to installation.

Installation Notes

Always power down and disconnect the tool from its power source before mounting or removing the brush. Confirm the tool spindle speed does not exceed the 22,000 RPM maximum rating of this brush. Operators should wear appropriate eye and face protection as required by applicable workplace safety standards. Inspect the brush for wire fatigue or distortion before each use and replace if damage is present.