Wire Cup Brush UN SZ DT 25 ST — steel wire, tapered/round shape, 25 mm Ø, 6 mm shank

UN SZ DT 25 ST is a wire cup brush with steel filaments, a tapered/round profile and a 25 mm diameter designed for use with tools that accept a 6 mm shank. Supplied as a single piece, this compact brush is intended for mechanical surface preparation tasks such as cleaning, deburring, and removal of rust and paint from metal and other hard materials. The round-tapered form provides controlled contact area for access to tight spots and edges while mounted on rotary tools, die grinders or hand-held drills with a 6 mm collet.

Advantages

The steel wire filaments offer aggressive material removal and high durability for repeated use on metal surfaces. The tapered/round shape improves access to contours and recessed areas compared with flat cup brushes, enabling more precise work on profiles and weld seams. Its 6 mm shank ensures compatibility with a wide range of standard rotary tools and small grinders. The compact 25 mm diameter balances reach and control, making it suitable for detail work where larger brushes would be impractical.

Suitable for

• Removing rust, scale and old paint from steel and ferrous surfaces
• Deburring and edge blending of machined or welded parts
• Cleaning weld seams, grooves and recesses
• Surface preparation before welding, painting or coating
• Detail work with rotary tools, die grinders or drills with 6 mm shank capacity

Key specifications

• Brush type: wire cup brush with tapered/round profile
• Filament material: steel wire
• Diameter: 25 mm
• Shank diameter: 6 mm
• Form factor: single-piece accessory (1 pc)

How to use

Install the brush into the tool’s chuck or collet and ensure the 6 mm shank is securely fastened. Operate at the recommended speed range for steel wire cup brushes as specified by your tool manufacturer; avoid excessive speeds that can cause filament breakage or unsafe vibration. Apply light to moderate pressure and let the brush do the cutting action—do not force the brush into the workpiece. Move the tool steadily across the surface and adjust angle and contact to access recessed areas with the tapered profile. After use, inspect the filaments for wear and discard the brush if significant filament loss or deformation is observed.

Usage recommendations

For safe and effective operation, use appropriate personal protective equipment including eye protection, gloves and respiratory protection if working with paints or rust dust. Select a rotational speed compatible with steel wire filaments, avoid side-loading the shank, and replace the brush when filaments are worn or bent to maintain consistent performance.