Weiler 94703 Knotted Cup Brush 6 Inch Steel Wire

Product Description

The WEILER 94703 is a knotted steel wire cup brush designed for heavy-duty surface preparation and weld cleaning on angle grinders and other compatible power tools. Measuring 6 inches in diameter with a 0.014-inch wire diameter, this single-row brush delivers aggressive cutting action for removing rust, scale, weld spatter, and mill scale from metal surfaces. The knotted wire construction increases wire stiffness and extends service life compared to crimped configurations. Rated to 6,600 RPM maximum, it suits high-torque right-angle grinders used in fabrication, structural steel work, and maintenance applications. The brush weighs 2.5 pounds and is sold individually.

This cup brush is suited for metalworking trades including welding, pipefitting, structural steel erection, and general industrial maintenance. It performs well on flat and curved steel surfaces where aggressive stock removal or surface conditioning is required ahead of coating, welding, or inspection. The 1-3/8-inch trim length provides controlled flex and durability under sustained load. It is commonly used in fabrication shops, field construction, and heavy equipment service environments where a consistent, uniform surface profile is needed.

Key Features

• Knotted steel wire construction for aggressive surface removal and extended wire life
• 6-inch brush diameter covers wide surface area per pass
• Single-row configuration for focused, high-pressure contact
• 6,600 RPM maximum speed rating compatible with standard right-angle grinders
• 5/8-11 threaded arbor hole for direct mounting to angle grinder spindles
• 1-3/8-inch trim length balances stiffness and controlled flex

Compatibility

Designed for use with angle grinders equipped with a standard 5/8-11 threaded spindle, which is the industry-standard arbor size for most 4-1/2-inch to 7-inch right-angle grinders.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with abrasive wheel safety. Always power down and disconnect the grinder before mounting or removing the brush. Verify that the tool spindle speed does not exceed the 6,600 RPM maximum rating stamped on the brush before operating. Wear appropriate PPE including eye and face protection, as wire bristles can detach during use.