Types of Brushes

What kind of brush offers you the best performance at the best value? That can involve a number of variables. These issues are inter-related, but can be considered in four broad categories: Brush Style, Dimensions, Construction Materials and Settings.

How these variables are combined will depend upon your operation. United Rotary Brush custom brush design specialists will work with you to answer three fundamental questions:

  • Are there changes to your brush design that could help increase line speed or other production enhancement?
  • Are there changes to your brush design that could help increase the life of your brush?
  • Are there changes to your brush design that could help you cut brush costs without making significant sacrifice to your process outputs?

Brush Style

  • Rewrapped shaft
  • Disposable brush
  • Brush Strips
  • Coils

Brush Dimensions

  • OD/ID
    (filament trim length)
  • Brush face
  • Pitch
  • Density

Materials of Brush Construction

  • Filament
  • Metal Channel
  • Brush Core

Brush Settings

  • Brush speed (rpm)
  • Downward pressure
  • Cooling

Brush Style

Will a rewrapable or disposable brush work best for you?

When your process demands the most effective brushing, United Rotary Brush rewrapable brushes provide the solution. Our brushes are wound directly on your shaft and are dynamically balanced to ensure smooth, uniform brushing for the most critical surfaces. After the brush life is consumed simply return the worn brush shaft to our facility to be rewrapped.

In some cases, a disposable brush provides a quicker, more convenient replacement solution. These brushes are designed to be disposed of once the filament is worn out. Benefits of disposable brushes are:

Quicker change out and replacement.
No need to send shafts back to rewraping.
Easy to store and maintain spares.
Brush strips and coils are available in a wide range of sizes and configurations. They offer a low cost alternative for light duty applications.

Materials of Brush Construction – Brush Filament

Due to the chemical composition of the different filament materials, some filament varieties are better suited for certain applications than others. In addition, filament specifications – diameter, trim length, and grit size – can be specified to meet the needs of your application.

Following is a brief overview of some of the primary brush filament options:

Nylon is a very common filament choice because of its range of use. It can be formulated to provide heat, chemical and abrasion resistance, and features excellent flex life, bend recovery, and “Flick Action.”

Abrasive Nylon is required for aggressive cleaning or demanding processing applications. The nylon is impregnated with Aluminum Oxide or Silicone Carbide grit. Like sand paper, the grit size can be adjusted to meet the application requirements.

Polypropylene is a common economical synthetic filament that is formulated to address a wide range of brushing applications. Polypropylene is particularly applicable for high moisture conditions where consistent bristle stiffness is required and also offers resistance to many acids and solvents.

Polyester is a synthetic filament used often on trommel screen and harvesting brushes. It offers a consistant stiffness in wet applications and abrassion resistance.

Natural filaments, such as Tampico or other plant fiber, are less abrasive than synthetic materials and often appropriate for wet cleaning conditions.

Wire is a common filament choice, especially in situations in which a “cutting action” is required. Wire can be drawn from various metals – including stainless steel, carbon steel and brass – depending upon the requirements of the application.

Your United Rotary Brush custom brush specialist can help you choose the best filament for your application and operating conditions.