Brush Research Mfg. BNH1220 Knotted Wire End Brush

Product Description

The BRUSH RESEARCH MFG. BNH1220 is a knotted wire end brush constructed with carbon steel fill material and a steel shank. It is designed for aggressive surface preparation, deburring, cleaning, and weld-scale removal on metal workpieces. The brush operates at a maximum rated speed of 20,000 RPM, making it suitable for use with high-speed die grinders, rotary tools, and similar power equipment. The knotted wire configuration delivers concentrated, high-impact abrasive action compared to crimped wire alternatives. A 3/4-inch shank is included and integrated into the brush body for direct chuck mounting. Metalworkers, fabricators, maintenance technicians, and industrial tradespeople are the primary users of this tool.

This end brush is used in metalworking, fabrication, and industrial maintenance applications where surface conditioning or material removal is required on metal parts, welds, castings, and pipe ends. Its hollow center design concentrates wire contact at the brush perimeter, improving reach into recesses and bore openings. At 1.75 inches in width, it is sized for spot work and detail cleaning rather than broad surface coverage. It is a single-piece, per-unit item suitable for one-off replacement or stocking in tool cribs and field service kits.

Key Features

• Knotted carbon steel wire fill for aggressive deburring and surface cleaning
• Maximum operating speed of 20,000 RPM for use with high-speed rotary tools
• Integrated 3/4-inch steel shank included for direct chuck mounting
• Hollow center construction concentrates wire contact at brush perimeter
• Non-piloted, non-bridled, non-encapsulated, and non-flared configuration
• Wire diameter in the 0.0101 to 0.0200 inch range for medium-duty wire aggressiveness

Compatibility

Designed for use with die grinders, rotary tools, and power equipment fitted with a chuck or collet accepting a 3/4-inch shank. Verify that the tool's rated operating speed meets or exceeds the brush's 20,000 RPM maximum before mounting.

Installation Notes

Installation should be performed by a qualified operator familiar with rotary abrasive tool safety. Always verify that the tool's no-load RPM does not exceed the 20,000 RPM maximum rating of the brush before use. Ensure the shank is fully seated and the chuck or collet is properly tightened before operating. Wear appropriate PPE including eye protection and gloves, and keep bystanders clear of the operating plane of the brush.