3" x 5/8"-11 Nylon Wire Cup Brush

3" X 5/8-11 ABRASIVE NYLON CUP BRUSH

The Benchmark Abrasives 3" x 5/8-11 abrasive nylon cup brush is built for broad surface cleaning, scuffing, and coating-preparation work with a flexible abrasive action that does not rely on steel wire. Its abrasive-impregnated nylon filaments conform to the work surface while providing consistent cutting action for paint removal, oxidation cleanup, surface preparation, and finish refinement.

The 3" cup profile provides broad face contact for efficient coverage on larger areas, while the 5/8-11 threaded mount is designed for compatible angle grinders. Available in 80, 120, and 240 grit, this brush covers applications from coarse rust and coating removal through finer preparation on wood, plastics, fiberglass, and other materials. Use it to scuff surfaces before primer or bed-liner application, following the coating manufacturer's final preparation requirements.

Quantity: 1 Piece

Product Specifications

Features

• Abrasive-impregnated nylon filaments for cleaning and surface preparation
• 3" cup profile provides broad face contact for efficient surface coverage
• 5/8-11 threaded mounting for compatible angle grinders
• Flexible filament action conforms to the work surface
• Available in coarse, medium, and fine grit options
• Color-coded filaments simplify grit identification
• Suitable for scuffing and preparation before primer or bed-liner systems
• Useful for paint, oxidation, corrosion, and finish removal across multiple materials

Applications & Performance

Choose the grit based on the material and desired level of aggressiveness:

The cup shape provides broad surface contact, making it useful for larger flat or gently contoured areas. For primer, bed-liner, or other coating preparation, follow the coating manufacturer's required surface profile and preparation instructions rather than relying on brushing alone.

Materials

Suitable applications vary by grit and may include:

• Steel
• Stainless steel
• Cast iron
• Aluminum
• Brass
• Copper
• Wood
• Fiberglass
• Plastic
• Hard rubber
• Stone and masonry

Machine Compatibility

Designed for compatible angle grinders using a 5/8-11 spindle and a maximum tool speed that does not exceed the brush's 10,000 RPM rating.

Compatible examples include:

• Makita® XAG04Z
• Milwaukee® Models: 2880-20, 2881-20

These models have 5/8-11 spindles and 8,500 RPM maximum speeds, below the brush's 10,000 RPM rating. Before use, confirm the tool permits this cup size and brushing application, with correct thread engagement, hub seating, guard clearance, and auxiliary handle use.

Do not use on grinders with a maximum speed above 10,000 RPM, even if the grinder has a lower-speed setting.

Safety Tips

• Always wear appropriate eye, face, respiratory, hearing, and hand protection for the application.
• Never exceed the brush's 10,000 RPM maximum rating.
• Confirm the grinder's maximum rated speed is at or below the brush rating before use.
• Thread the brush fully onto the spindle and confirm proper seating before starting the tool.
• Inspect the brush before every use and discontinue use if the brush, hub, or mounting components are damaged.
• Start with light pressure and allow the abrasive nylon filaments to do the work.
• Avoid excessive pressure or speed that can generate unnecessary heat or distort the nylon filaments.
• Test on an inconspicuous area when working on finished, polished, coated, plastic, wood, or other appearance-sensitive surfaces.
• Follow all grinder-manufacturer requirements for guarding, auxiliary handles, accessory clearance, and brushing applications.
• Brush wet/dry capability does not override restrictions of the power tool being used.