Power Brushes Design Specifications

When determining the exact filament characteristics your application requires, many aspects must be addressed. The filament’s diameter, trim length and density will determine the aggression, surface penetration, flexibility and speed of the power brush. The mounting component is the other design consideration of power brushes and it is important to use the largest diameter power brush your equipment can handle.

The filament diameter affects the aggression of the brush. Thicker filament is more aggressive because it has more weight to support the brushing action. Trim length is important as longer trim equals a less aggressive but more flexible brush, ideal for hard-to-reach areas. Short trim lengths are more aggressive but less flexible and are great for areas requiring accurate brushing.

Brush density and length of fill material are important characteristics for designing your brush tool. Heavy density fill allows for more contact points, increasing the brushing action and extending the brush life. Brush density appearance can be affected by the filament shape and can be produced with a round crimp, round level (straight) or the abrasive fill also can be produced with a rectangular shape. Crimped wire provides more even breaks and a lighter more flexible brushing action.

• Round crimp has a wave in the filament which provides a denser brush appearance and produces a continuous and more even brushing action. Crimp is measured by the amplitude, depth of the crimp and frequency and number of crimps per inch.
• Level or straight fill provides a less dense appearance. The exposed view of the filament is known as the trim length and is the working strength of the brush.