Weiler 94845 Knotted Wheel Brush 4 Inch Carbon Steel

Product Description

The WEILER 94845 is a knotted wire wheel brush designed for aggressive surface preparation and weld cleaning on metal workpieces. Built with carbon steel stringer bead twist wire, it delivers the high-contact force needed to remove mill scale, weld spatter, rust, and heavy coatings. The 4-inch outside diameter and 5/8-11 threaded arbor mount directly to standard angle grinders and bench grinders with compatible spindle threads. Rated to 20,000 RPM, the brush handles demanding continuous-use applications. A 7/8-inch trim length and 3/16-inch face width focus wire contact for concentrated cleaning and blending action. Installers and fabricators in metalworking, pipefitting, and structural steel trades rely on this brush type for pre-weld and post-weld surface work.

The WEILER 94845 is suited for use in metal fabrication shops, pipeline service, structural steel erection, and general industrial maintenance. It attaches to angle grinders equipped with a 5/8-11 threaded spindle, which is a common configuration on 4-inch and 4.5-inch grinders across major tool brands. Typical applications include cleaning weld joints before inspection, removing oxidation from ferrous metal surfaces, and preparing base metal for coating or welding. This brush is intended for professional use by welders, pipefitters, ironworkers, and maintenance technicians working on ferrous metal assemblies.

Key Features

• Knotted stringer bead twist wire construction for aggressive material removal
• Carbon steel fill material rated for ferrous metal surface preparation
• 5/8-11 threaded arbor for direct mount to standard angle grinder spindles
• 20,000 RPM maximum speed rating for high-demand continuous use
• 4-inch outside diameter with 3/16-inch face width for focused wire contact
• 7/8-inch trim length maintains consistent wire tension across the work surface

Compatibility

Designed for use with angle grinders and bench grinders equipped with a 5/8-11 threaded spindle arbor. Confirm the tool spindle thread size and maximum RPM rating meets or exceeds 20,000 RPM before installation.

Installation Notes

Installation and operation should be performed by qualified tradespeople familiar with angle grinder safety practices and ANSI B11 or applicable abrasive wheel standards. Always power down and disconnect the grinder from its power source before mounting or removing the brush. Verify the tool spindle RPM rating is not exceeded by the brush maximum RPM rating of 20,000 RPM, and confirm the 5/8-11 thread engagement is complete and secure before starting the tool. Wear appropriate PPE including face shield, safety glasses, and gloves when operating knotted wire brushes, as wire breakage can occur under load.