3M PN05996 mandrel for 75 mm radial brush model 990M

The 3M mandrel for 75 mm radial brush Model 990M is a replacement mounting shaft designed to secure 75 mm radial brush assemblies to compatible rotary tools. It provides a stable interface that ensures correct seating and rotation of the brush, maintaining consistent contact with work surfaces for tasks such as surface finishing, deburring and cleaning in metalworking and fabrication environments.

Advantages

This mandrel is manufactured to fit 75 mm radial brush assemblies with accurate alignment to minimize wobble and uneven wear. Its construction supports reliable brush rotation at typical tool speeds, helping to extend brush life and maintain consistent finishing performance. As a dedicated spare shaft, it simplifies maintenance and reduces downtime by allowing quick replacement when the original mandrel shows wear.

Suitable for

• Securing 75 mm radial brush attachments on compatible rotary tools
• Surface finishing of metal components
• Deburring edges after cutting or machining
• Cleaning weld spatter and removing light corrosion
• Routine maintenance and replacement in fabrication workshops

Key specifications

• Compatible brush diameter: 75 mm radial brush assemblies
• Function: mounting shaft / mandrel for radial brush attachment
• Material characteristics: durable metal construction suitable for mechanical fastening and rotational loads
• Intended use: rotary tool attachment for surface conditioning, deburring and cleaning
• Fit: designed for secure seating and alignment with 75 mm radial brushes

How to use

Ensure the rotary tool is powered off and disconnected from its power source before installing the mandrel. Remove the worn or existing mandrel from the radial brush assembly if present, then insert the replacement mandrel into the brush hub and secure it according to the brush assembly’s fastening method. Confirm the mandrel and brush are seated correctly and that the assembly rotates freely by hand before powering the tool. Adjust tool speed and pressure according to the brush type and workpiece material during operation.

Recommendations

Use appropriate personal protective equipment, including eye and hand protection, when operating rotary tools with radial brushes. Inspect the mandrel and brush for secure attachment and damage before each use, and replace the mandrel if there are signs of bending, excessive wear or loosened fastening. Match tool speed and applied pressure to the brush type and workpiece to avoid premature wear and achieve consistent surface results.