Weiler 94687 Knotted Steel Cup Brush 2-3/4 in 14000 Rpm

Product Description

The WEILER 94687 is a knotted steel cup brush designed for aggressive surface preparation, weld cleaning, and rust or scale removal on metal workpieces. The 2-3/4 inch diameter cup-style configuration concentrates wire contact over a focused area, making it effective for working inside contours, pipe ends, and weld joints. Wire diameter measures 0.02 inches, and the knotted fill construction delivers high impact force at the wire tips for cutting action on tough surface deposits. A single-row configuration and 1 inch trim length maintain consistent brush pressure throughout the tool life. Rated to 14,000 RPM maximum, this brush is suited for use on standard angle grinders and die grinders. Metalworking tradespeople, pipefitters, and fabricators are the primary installers of this tool.

This cup brush is intended for metal surface preparation tasks in fabrication shops, maintenance facilities, and field welding environments. Typical applications include pre-weld and post-weld cleaning, removal of mill scale, rust, paint, and coatings from ferrous metal surfaces. The 5/8-11 threaded arbor hole is the standard mount for most 4-inch to 5-inch angle grinders used in the trades. Single-row knotted wire construction is preferred when a more aggressive cut rate is needed compared to crimped wire alternatives.

Key Features

• Knotted steel wire fill provides aggressive cutting action for heavy-duty surface prep
• 2-3/4 inch cup diameter focuses wire contact for weld seam and inside-corner work
• 0.02 inch wire diameter balances stiffness and surface coverage
• 5/8-11 threaded arbor hole fits standard angle grinder spindles
• 14,000 RPM maximum speed rating compatible with common grinder operating speeds
• Single-row configuration with 1 inch trim length for consistent brush geometry

Compatibility

Designed for use on angle grinders and die grinders equipped with a 5/8-11 threaded spindle, which is the standard arbor size on most 4-inch to 5-inch angle grinders used in metal fabrication and maintenance trades.

Installation Notes

Ensure the grinder is unplugged or the battery is removed before mounting or removing the cup brush. Thread the 5/8-11 arbor fully onto the grinder spindle and verify it is secure before operation. Always confirm the tool's no-load RPM does not exceed the 14,000 RPM maximum rating marked on the brush. Operators should wear appropriate eye and face protection, gloves, and a face shield per ANSI B11 and tool manufacturer guidelines when using wire brushes at speed.