Tru-maxx 88525 End Brush 3/4 in Knotted Steel Wire

Product Description

The TRU-MAXX 88525 is a knotted wire end brush designed for aggressive surface preparation, deburring, cleaning, and rust or scale removal on metal workpieces. The brush mounts on die grinders, rotary tools, or drill presses via its included steel shank. It measures 0.75 inches in diameter and operates at up to 22,000 RPM, making it suitable for high-speed power tool applications. Knotted wire construction delivers more aggressive cutting action compared to crimped wire, making this brush a go-to for weld prep, coating removal, and heavy surface scale. It weighs 0.15 pounds and is sold individually.

This end brush is used across metalworking, fabrication, welding, and maintenance trades. It is well suited for reaching into tight bores, corners, and recessed surfaces where flat or cup brushes cannot access. Typical applications include weld seam cleanup, pipe end preparation, port cleaning, and removing oxidation or mill scale from steel and iron components. Technicians in HVAC, plumbing, pipefitting, and general industrial maintenance commonly use this style of brush with pneumatic die grinders or electric rotary tools.

Key Features

• Knotted wire construction for aggressive material removal and surface prep
• 0.75 inch brush diameter fits tight bores and recessed work areas
• Rated up to 22,000 RPM for compatibility with high-speed rotary and die grinder tools
• Steel fill wire with filament diameter range of 0.0101 to 0.0200 inches
• Steel shank included — no separate arbor required for most standard collet sizes
• Compact 2.63 inch overall height for use in confined spaces

Compatibility

Designed for use with die grinders, rotary tools, and drill presses that accept a standard straight shank end brush and operate within the 22,000 RPM maximum speed rating.

Installation Notes

Always confirm the tool spindle speed does not exceed the 22,000 RPM maximum before mounting this brush. Secure the shank fully in the collet or chuck and inspect the wire fill for damage before each use. Wear appropriate eye protection and gloves when operating any wire brush at high speed. Follow applicable shop safety standards and tool manufacturer guidelines for accessory mounting and RPM limits.