Norton 66252838812 Knotted Cup Brush 2-3/4 in Stainless Steel

Product Description

The NORTON 66252838812 is a knotted wire cup brush designed for aggressive surface preparation, weld cleaning, rust removal, and scale stripping on metal workpieces. It features a stainless steel wire fill with a 0.02-inch wire diameter and a single-row knotted construction that delivers high-impact abrasive action. The brush mounts via a 5/8-11 threaded arbor, making it compatible with standard right-angle grinders. Rated to 14,000 RPM, it is suited for demanding industrial and trade applications. With a 2-3/4 inch brush diameter and 1-inch trim length, it provides concentrated cutting action in weld seams, corners, and confined joint areas. Metalworkers, pipefitters, fabricators, and welders are the primary installers of this tool.

This cup brush is used in metal fabrication shops, structural steel erection, pipeline work, and maintenance welding applications. It performs well on stainless steel substrates where carbon steel wire could cause cross-contamination. The stainless steel wire fill makes it appropriate for use on food-grade equipment, pharmaceutical fabrication environments, and any application where ferrous contamination of the base material is not acceptable. It is sold individually and is ordered in multiples of 10.

Key Features

• Knotted wire construction delivers aggressive cutting action for weld spatter, rust, and mill scale removal
• Stainless steel wire fill prevents ferrous contamination on sensitive base metals
• 0.02-inch wire diameter provides a balance of stiffness and surface coverage
• 5/8-11 threaded arbor mounts directly to standard right-angle grinders without adapters
• 14,000 RPM max speed rating supports use on full-speed grinders
• Single-row configuration concentrates wire contact for seam and joint cleaning

Compatibility

Designed for use with right-angle grinders and die grinders fitted with a 5/8-11 threaded spindle. Confirm that the grinder speed does not exceed 14,000 RPM before mounting.

Installation Notes

Always verify that the grinder spindle speed does not exceed the 14,000 RPM maximum rating of the brush before operation. Disconnect and de-energize the grinder before mounting or removing the brush. Wear ANSI-rated eye protection, a face shield, and appropriate gloves when operating wire brushes, as broken wire fragments are a recognized hazard. Follow ANSI B11 and OSHA 29 CFR 1910.215 guidelines for abrasive wheel machinery during use.