Norton 66252838835 Knotted Cup Brush 3 in Carbon Steel

Product Description

The NORTON 66252838835 is a knotted carbon steel cup brush designed for aggressive surface preparation on metal and fabricated components. The 3-inch diameter brush uses 0.02-inch diameter knotted wire strands that concentrate force at contact points, making it well suited for weld cleanup, rust removal, scale removal, and paint stripping. Rated to 14,000 RPM maximum, this brush is intended for use with angle grinders and compatible threaded-arbor tools. It features a single-row wire configuration and a 7/8-inch trim length. Licensed tradespeople and metal fabricators rely on this type of cup brush for heavy-duty surface conditioning ahead of coating or inspection.

This knotted cup brush is used in metal fabrication shops, structural steel erection, pipefitting, and maintenance welding environments. It is appropriate for residential and commercial applications where aggressive mechanical surface preparation is required before welding, painting, or coating. The threaded 5/8-11 arbor makes it compatible with standard angle grinder spindles commonly found on job sites. It is not intended for use on aluminum, soft metals, or coated surfaces where wire contamination is a concern.

Key Features

• Knotted wire construction delivers concentrated cutting action for heavy scale, rust, and weld spatter removal
• 3-inch brush diameter for efficient coverage in cup brush grinder applications
• 0.02-inch wire diameter carbon steel fill provides durability under sustained load
• 14,000 RPM maximum speed rating for use with standard angle grinders
• 5/8-11 threaded arbor hole fits most common angle grinder spindles
• Single-row configuration with 7/8-inch trim length for controlled wire deflection

Compatibility

Designed for use with angle grinders equipped with a standard 5/8-11 threaded spindle arbor. Verify tool RPM rating meets or exceeds 14,000 RPM before mounting.

Installation Notes

Installation should be performed by a qualified tradesperson following grinder and accessory manufacturer guidelines. Always power down and disconnect the grinder from its power source before mounting or removing the brush. Confirm the grinder spindle speed does not exceed the 14,000 RPM maximum rating marked on this brush before operation. Wear appropriate personal protective equipment including face shield and gloves when operating wire cup brushes, in accordance with applicable ANSI and OSHA standards.