Osborn 0003074000 End Brush 1 in Steel Knotted Wire

Product Description

The OSBORN 0003074000 is a knotted-wire end brush designed for aggressive surface preparation, deburring, and weld cleaning in metalworking, fabrication, and maintenance applications. Built with steel knotted wire filaments ranging from 0.0101 to 0.0200 inches in diameter, this brush delivers the aggressive cutting action needed to remove mill scale, rust, and heavy contaminants from metal surfaces. It operates at a maximum rated speed of 20,000 RPM and includes a shank for direct chuck mounting on die grinders and rotary tools. The 1-inch brush diameter makes it well suited for working in confined areas, ports, and irregular surfaces where flat or cup brushes cannot reach.

This end brush is used across metal fabrication shops, pipe yards, welding operations, and general industrial maintenance. It is appropriate for both ferrous and mild steel substrate prep work. The shank-mount design fits standard die grinders and flexible shaft machines commonly used by machinists, pipefitters, ironworkers, and maintenance technicians. It is sold as a single unit per package.

Key Features

• 1-inch brush diameter for access to tight areas and confined profiles
• Knotted steel wire construction for aggressive material removal and surface prep
• Wire diameter range of 0.0101 to 0.0200 inches for firm, durable fill
• 20,000 RPM maximum rated speed compatible with standard die grinders
• Shank included for direct chuck mounting — no adapter required
• Not bridled, flared, or encapsulated — full wire exposure for maximum aggressiveness

Compatibility

Designed for use with die grinders, rotary tools, and flexible shaft machines accepting a standard shank-mount end brush. Verify that the tool's rated RPM meets or exceeds the 20,000 RPM maximum before use.

Installation Notes

Installation is performed by machinists, fabricators, or maintenance technicians using appropriate rotary tools. Always confirm the tool spindle speed does not exceed the brush maximum RPM rating of 20,000 before operating. Wear appropriate PPE including eye protection and gloves, as wire ends can shed under load. Inspect the brush for loose or broken wires before each use and replace if filament loss is observed.