Disston Company 307231 Knotted Wire Cup Brush 3 Inch

Product Description

The DISSTON COMPANY 307231 is a 3-inch knotted wire cup brush built for aggressive material removal on metal surfaces. The knotted wire configuration delivers firm, consistent contact pressure across the work surface, making it effective for stripping rust, scale, weld spatter, and heavy coatings. Wire diameter is 0.020 inches, balancing aggressiveness with durability under sustained load. The 5/8-11 threaded arbor is the standard grinder thread used across most angle grinder platforms. This brush is rated for tool speeds up to 12,500 RPM and is installed by metalworkers, fabricators, pipefitters, and maintenance mechanics working with angle grinders in production or field settings.

The 307231 is designed for heavy-duty applications where surface prep demands consistent, high-speed abrasion. It fits both electric and air-powered angle grinders equipped with a 5/8-11 arbor. Typical use cases include weld joint cleanup, rust and scale removal on structural steel, surface preparation before coating or welding, and deburring on pipe and plate. It is well-suited for shop fabrication environments and industrial maintenance settings where repeated, aggressive use is expected.

Key Features

• 3-inch cup brush diameter for focused, high-pressure contact on localized work areas
• Knotted wire construction provides aggressive cutting action for heavy-duty surface prep
• 0.020-inch wire diameter delivers firm bristle stiffness for rust, scale, and coating removal
• 5/8-11 threaded arbor fits standard electric and air-powered angle grinders
• Rated up to 12,500 RPM for compatibility with high-speed grinder operation

Compatibility

Designed to fit both electric and air-powered angle grinders equipped with a standard 5/8-11 threaded arbor and rated to operate at speeds up to 12,500 RPM.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with angle grinder safety procedures. Always power down and disconnect the grinder from its power or air supply before mounting or removing the brush. Thread the 5/8-11 arbor fully onto the grinder spindle and confirm the brush is securely seated before operation. Always wear appropriate PPE including a face shield, gloves, and hearing protection when operating wire cup brushes at speed.