Value Collection 2107538350 Knotted Cup Brush Brass

Product Description

The VALUE COLLECTION 2107538350 is a knotted cup brush designed for aggressive surface preparation and cleaning on metal, weld seams, and scale-covered workpieces. The brush features a 2-3/4 inch diameter knotted brass wire fill with a 0.02 inch wire diameter, delivering firm, consistent contact across the work surface. The threaded 3/8-24 arbor hole mounts directly to angle grinders and die grinders used in fabrication, plumbing, HVAC, and general mechanical trades. A maximum rated speed of 12,500 RPM makes this brush suitable for high-speed power tool applications where faster material removal is required.

This cup brush is used in applications where oxidation, weld spatter, rust, or surface scale must be removed before fitting, welding, brazing, or coating. Brass wire fill is a common choice when working on softer base metals or in environments where steel wire contamination is a concern. The single-row knotted configuration concentrates wire tension at the contact point, making it effective on tight radii, pipe ends, and fillet welds. Typical users include pipefitters, HVAC technicians, welders, and maintenance mechanics.

Key Features

• Knotted wire construction for aggressive surface preparation and cleaning action
• Brass fill material reduces risk of ferrous contamination on sensitive base metals
• 2-3/4 inch brush diameter provides broad contact area for flat and curved surfaces
• 0.02 inch wire diameter balances stiffness with surface conformance
• 3/8-24 threaded arbor hole for direct mounting to standard angle grinder and die grinder spindles
• 12,500 max RPM rating compatible with most handheld power tools in this class

Compatibility

Designed for use with angle grinders and die grinders equipped with a 3/8-24 threaded spindle. Confirm spindle thread size and tool RPM rating before mounting.

Installation Notes

Installation and removal must be performed with the grinder unplugged or battery removed. Thread the brush onto the spindle by hand until snug, following the tool manufacturer torque guidance. Always verify the tool's no-load RPM does not exceed the 12,500 RPM rating marked on the brush before operation. Operators should wear ANSI-rated eye protection and a face shield when using cup brushes on powered equipment.