120mm P320 AO Cup Brush

This product is a rotary finishing brush formed from P320 aluminum oxide abrasive nylon filaments set in a cup-shaped 6061 aluminum hub with a threaded removable mount. It is used on angle grinders and compatible rotary tools to remove light surface defects, blend weld areas, and produce a controlled fine finish on metal components.

In operation, the brush face is presented to the work at a slight angle or flat, and the tool moves across the surface while the filaments recover after each pass. The P320 grain levels fine texture without the deep scratch pattern of coarse wire or heavy grit. The result is typically a smooth satin or matte surface ready for paint, coating, inspection, or direct use.

This is not a heavy material-removal tool. Deep weld spatter, thick scale, paint stripping, or stock removal should be handled with wire wheels, flap discs, grinding wheels, or chemical methods before or instead of this brush. The 120 mm diameter also sets a practical access limit: surfaces narrower than the brush face and internal corners tighter than the cup profile will need a smaller or different brush form.

Standard configuration shown. Dimensions, grit, hub thread, and filament density can be adjusted for the project.

Confirm thread size and hand with the machine before ordering. Speed must stay within the rated maximum for the brush diameter and hub design; do not exceed the value marked on the brush label or hub.

• Weld blending on sheet metal and tube fabrications: Used after weld dressing to remove heat tint and light spatter residue while smoothing the transition into the base metal.
• Aluminum extrusions, castings, and machined plates: Removes oxidation haze, light burrs, and machining marks without contaminating parts with ferrous wire debris.
• Stainless steel architectural components and handrails: Creates a consistent fine directional finish on open faces and outside edges where uniform appearance matters.
• Pre-coating preparation: Lightly textures and cleans surfaces before painting, powder coating, or adhesive bonding, improving coating adhesion without aggressive stock removal.
• Finishing of formed or stamped parts: Blends edge burrs and profile lines on large, open surfaces accessible to the 120 mm face.

The brush is best on open working areas. Deep pockets, slots narrower than the brush diameter, internal corners, and small bores are outside its effective reach.

Yes. The standard version is 120 mm diameter with P320 AO nylon, a 40 mm head length, a 6061 aluminum hub, and a threaded connection. For a project we can adjust:

• Diameter and face geometry: Smaller or larger cup diameters, flat face, shallow conical face, or radiused rim for edge work.
• Grit and abrasive type: Alternative grits from coarse to extra fine; AO, ceramic, or silicon carbide filament options where the process requires a different cut.
• Filament density and stiffness: Higher or lower filament counts for longer wear, softer contact, or more aggressive surface engagement.
• Hub and thread: Thread size and pitch, bore, retention features, steel or aluminum hub, and balancing requirements.
• Head length: Deeper or shallower filament projection to reach angled faces or reduce flex.
• Color, marking, and packaging: Custom hub color, label or print, individual or bulk packaging matched to your distribution channel.

To define the configuration, provide the machine spindle drawing or thread specification, target operating speed, base material, current surface condition, desired finish requirement, and production quantity. If the project calls for material documentation, inspection data, or third-party testing, we can build that support into the custom order.