Value Collection S04185716 Cup Brush 3-3/16 in Knotted Steel

Product Description

The VALUE COLLECTION S04185716 is a knotted steel cup brush designed for heavy-duty surface preparation, weld cleaning, rust and scale removal, and paint stripping on metal workpieces. The brush measures 3-3/16 inches in diameter with a wire diameter of 0.0314 inches and features a single-row knotted fill pattern that delivers aggressive, coarse-grade cutting action. It is rated for a maximum of 8,500 RPM and mounts via a 5/8-11 threaded arbor, making it compatible with standard angle grinders. Installers and fabricators in HVAC, plumbing, and general metalworking trades reach for this type of brush when preparing pipe ends, cleaning weld beads, or removing surface corrosion before fitting assembly.

This cup brush is suited for use on ferrous metal surfaces in both residential and commercial service environments. Typical applications include cleaning burrs and oxidation from steel pipe, prepping structural steel before welding, and removing mill scale or old coatings. The coarse-grade knotted construction makes it best suited for aggressive stock removal rather than fine finishing. It is used primarily by welders, pipefitters, and HVAC technicians working with steel components requiring clean, bare-metal surfaces prior to joining or coating.

Key Features

• Knotted steel fill for aggressive, coarse-grade surface preparation
• 3-3/16 inch brush diameter with 0.0314 inch wire diameter
• Single-row construction for focused cleaning action
• 8,500 RPM maximum speed rating for use with standard angle grinders
• 5/8-11 threaded arbor hole fits common angle grinder spindles
• 24 mm trim length provides consistent wire exposure and contact

Compatibility

Designed for use with angle grinders equipped with a 5/8-11 threaded spindle, which is the standard arbor size for most 4-inch and 4-1/2-inch angle grinders used in trade applications.

Installation Notes

This brush is installed and operated by welders, pipefitters, and metalworking tradespeople using a compatible angle grinder. Always confirm the grinder spindle speed does not exceed the 8,500 RPM maximum rating marked on the brush before mounting. Power down and unplug or lock out the grinder before threading the brush onto the spindle. Operators should wear appropriate PPE including eye protection and gloves, as knotted wire brushes can shed wire fragments during use.