Weiler 94681 Knotted Steel Cup Brush 2.75 in

Product Description

The WEILER 94681 is a knotted steel wire cup brush designed for aggressive surface preparation on angle grinders and other threaded-arbor power tools. With a 2.75-inch brush diameter and 0.014-inch wire diameter, it delivers the concentrated scrubbing action needed to remove rust, mill scale, weld spatter, and heavy coatings from metal surfaces. The single-row knotted configuration concentrates wire tips for faster material removal compared to crimped-wire designs. Rated to 14,000 RPM, it is built for the high-speed demands of industrial and trade applications. Fabricators, welders, pipefitters, and maintenance technicians install this brush as part of pre-weld and post-weld surface work.

This cup brush is suited for use on structural steel, pipe, plate, and fabricated weldments in both shop and field environments. The 5/8-11 threaded arbor fits the standard spindle size found on most 4-inch and 4.5-inch angle grinders common in welding, HVAC sheet metal, and mechanical contracting trades. It handles tasks including rust removal, paint stripping, and cleaning weld beads prior to inspection or coating. Trim length is 1 inch, providing a firm, controlled brush face during aggressive work.

Key Features

• Knotted steel wire construction for aggressive cutting and fast material removal
• 2.75-inch brush diameter with single-row configuration for concentrated contact
• 0.014-inch wire diameter balances stiffness and flexibility for metal surface prep
• 14,000 RPM maximum rating suits high-speed angle grinder use
• 5/8-11 threaded arbor fits standard angle grinder spindles
• 1-inch trim length provides a firm, stable brush face

Compatibility

Designed for use on angle grinders and threaded-arbor power tools with a standard 5/8-11 spindle. Verify that the tool's rated no-load RPM does not exceed 14,000 RPM before mounting.

Installation Notes

Installation should be performed by a qualified operator familiar with angle grinder safety practices per ANSI B11 and OSHA 1910.243 guidelines. Disconnect and de-energize the tool before mounting or removing the brush. Thread the brush onto the spindle firmly by hand, then confirm it is secure before applying power. Always wear appropriate PPE including a face shield, safety glasses, and gloves, and never exceed the brush's maximum RPM rating.