Walter Surface Technologies 13G504 Knotted Cup Brush 5 in

Product Description

The WALTER SURFACE TECHNOLOGIES 13G504 is a knotted cup brush designed for aggressive surface preparation on metal workpieces. Built with carbon steel wire at 0.0200 inches in diameter, the knotted fill construction delivers high cutting action for weld cleaning, rust removal, and scale removal. The brush measures 5 inches in diameter and is rated to a maximum of 8,600 RPM. A single-row configuration concentrates the wire contact for focused stock removal. The threaded arbor design accepts a standard 5/8-11 spindle, making it compatible with most right-angle grinders used in fabrication and maintenance work.

This cup brush is suited for use in industrial fabrication shops, structural steel work, pipeline maintenance, and heavy equipment repair. It performs well on carbon steel substrates where aggressive cleaning or surface prep is needed before welding, coating, or inspection. The bridled construction helps control wire flare under load, maintaining consistent performance throughout the tool life. Licensed trades including ironworkers, pipefitters, millwrights, and maintenance mechanics commonly use this style of brush in production and field environments.

Key Features

• Knotted wire fill for aggressive material removal and weld cleaning
• Carbon steel wire at 0.0200 inches diameter for high-contact cutting action
• Bridled construction reduces wire flare and extends brush life
• 5/8-11 threaded arbor fits standard right-angle grinder spindles
• Single-row configuration focuses wire contact on the work surface
• Rated to 8,600 RPM maximum for use with common grinder speeds

Compatibility

Designed for use with right-angle grinders equipped with a 5/8-11 threaded spindle. No shank is included. Fits standard grinder arbors common in fabrication and industrial maintenance applications.

Installation Notes

Installation and operation should be performed by personnel trained in abrasive tool safety. Always confirm the grinder speed rating does not exceed the 8,600 RPM maximum marked on the brush before mounting. Power down and disconnect the grinder from its power source before mounting or removing the brush. Wear appropriate PPE including a face shield, gloves, and hearing protection during use, in accordance with ANSI B11 and applicable workplace safety standards.