Weiler 94707 Knotted Cup Brush 6 Inch Steel Wire

Product Description

The WEILER 94707 is a knotted steel wire cup brush designed for aggressive surface preparation and weld cleaning on angle grinders. Built with a 6-inch brush diameter and 0.023-inch wire diameter, it delivers the cutting action needed for heavy rust removal, mill scale cleaning, and weld spatter removal on structural steel, pipe, and fabricated assemblies. The single-row knotted fill pattern concentrates wire tension for faster material removal compared to crimped-fill designs. A 5/8-11 threaded arbor hole provides direct mounting to standard angle grinder spindles without adapters. Rated to 6,000 max RPM, this brush suits the heavy-duty grinders commonly used in welding shops, pipefitting, and industrial maintenance.

This cup brush is suited for industrial and trade applications including weld preparation, post-weld cleanup, coating removal, and surface profiling on ferrous metals. Pipefitters, ironworkers, welders, and maintenance mechanics reach for knotted cup brushes when crimped wire brushes lack the aggression needed for the job. The 1.625-inch trim length provides enough wire exposure for consistent contact across uneven or contoured surfaces.

Key Features

• 6-inch brush diameter for broad surface coverage on flat and curved workpieces
• Knotted steel wire fill for aggressive cutting action on rust, scale, and weld spatter
• 0.023-inch wire diameter balances stiffness and fill density for consistent stock removal
• 5/8-11 threaded arbor mounts directly to standard angle grinder spindles
• Single-row construction concentrates wire tension for maximum cutting efficiency
• 6,000 max RPM rating compatible with full-size angle grinders

Compatibility

Designed to mount on angle grinders with a 5/8-11 threaded spindle, which is the standard spindle thread found on most full-size 4.5-inch to 7-inch angle grinders used in industrial and trade applications.

Installation Notes

Installation is performed by threading the brush directly onto the grinder spindle and tightening by hand until secure. Always verify the grinder free-speed RPM does not exceed the 6,000 max RPM rating marked on the brush before operation. Wear ANSI-rated face shield, safety glasses, and leather gloves during use and mounting. Inspect wire fill for broken or loose wires before each use and remove the brush from service if damage is found.