Cup brushes are used for fast, heavy-duty cleaning on large flat surfaces. They can be used on both stationary and portable equipment to remove paint, rust, burrs, weld scale, and corrosion. Caution: A brush with a diameter over 6 inches should never be used on a portable tool.
Fill material determines corrosion resistance, non-sparking action, acid resistance, and durability of the brush. Softer wire material will result in a smoother finish, while harder material will result in a coarser finish.
Brass is softer than steel and stainless steel and will not scratch harder surfaces. It will not generate sparks when brushing metallic surfaces and works best on copper and brass.
Stainless steel is highly corrosion resistant and can be used in high humidity or wet conditions. It has a higher heat tolerance than steel, allowing use at temperatures up to 600 F on aluminum and stainless steel.
Steel is the most common filament/wire material due to its durability and cutting action. It is suitable for general purpose applications and can be used on iron, steel, aluminum, brass, copper and wood.
Stiff hair is tougher than soft hair. It is commonly used in cleaning, polishing and finishing.
Filament/Wire Diameter (Decimal Inch)
The diameter of a filament/wire determines the removal rate and conformity of the brush. Thinner will conform to the workpiece by bending into corners and around edges. Thicker will remove more material, but is more likely to increase brush wear.
Crimped brushes provide additional strength compared to straight brushes and are commonly used where a knotted brush's impact would alter the working surface.
Knotted brushes are made up of multiple filaments/wires bundled together to provide the most aggressive brushing action.
Flared (Yes/No)
Flared brushes allow the filaments/wires to reach into areas non-flared brushes cannot reach. This permits them to clean recesses in casting work and internal holes.
Bridled brushes are bound by a band that controls the flaring of the brush. The design makes the brush more aggressive and increases the brushes' cut rate and durability.
Cup brushes are used for fast, heavy-duty cleaning on large flat surfaces. They can be used on both stationary and portable equipment to remove paint, rust, burrs, weld scale, and corrosion. Caution: A brush with a diameter over 6 inches should never be used on a portable tool.
Abrasives 
