Weiler 94689 Knotted Cup Brush 2-3/4 in Stainless Steel

Product Description

The WEILER 94689 is a knotted stainless steel cup brush designed for aggressive surface preparation on angle grinders and die grinders. The knotted wire configuration delivers consistent cutting action for weld cleaning, rust removal, scale removal, and surface blending on metal workpieces. Wire diameter measures 0.02 inches, providing a balance of flexibility and cutting aggressiveness. The threaded 5/8-11 arbor hole mounts directly to standard angle grinder spindles without an adapter. Rated to 14,000 RPM maximum, this brush suits high-speed grinder applications common in fabrication, maintenance, and industrial service work.

This cup brush is suited for use on ferrous and non-ferrous metals where stainless steel wire is required to prevent carbon contamination of the workpiece surface. Typical applications include stainless steel weld bead cleanup, aluminum oxide scale removal, and surface conditioning prior to welding or coating. The single-row knotted construction focuses wire contact for controlled, high-pressure finishing. It is commonly used by welders, pipefitters, ironworkers, HVAC fabricators, and maintenance technicians working on tube, pipe, structural steel, and sheet metal assemblies.

Key Features

• Knotted wire construction for aggressive cutting action and weld cleaning
• Stainless steel fill material prevents carbon contamination on stainless and non-ferrous workpieces
• 2-3/4 inch brush diameter with single-row configuration for focused surface contact
• 0.02 inch wire diameter balances cutting aggressiveness with wire flexibility
• 5/8-11 threaded arbor hole fits standard angle grinder spindles
• 14,000 RPM maximum rating supports use on full-speed angle grinders

Compatibility

Designed for use with angle grinders and die grinders equipped with a 5/8-11 threaded spindle. Fits standard right-angle grinders commonly used in welding, fabrication, and industrial maintenance applications.

Installation Notes

Installation and operation should be performed by trained personnel familiar with abrasive wheel safety per ANSI B7.1 and tool manufacturer guidelines. Always verify the grinder spindle speed does not exceed the 14,000 RPM maximum rating of the brush before mounting. Power down and disconnect the grinder from its power source before installing or removing the cup brush. Wear appropriate PPE including a face shield, gloves, and hearing protection when operating wire brushes at speed.