motor brush spring

Motor Brush Springs

Electric motor manufacturers need high quality and long lasting motor brush springs to make their applications work properly and consistently. These springs are used to push a brush against the commutator in an electric motor and are a welcome alternative to round wire springs. At Vulcan Spring, our Constant Force motor brush springs give constant pressure to the brush allowing the motor to run longer and enabling your design to have the exact pressure for the motor’s entire life. With a Conforce® motor brush spring, you’ll add hours of operation to your motor or generator. 

Common Motor Brush Applications

  • Motor brush assemblies
  • Back plate assemblies
  • Car seats
  • Windshield wiper motors
  • Train & locomotive applications
  • Many other automotive applications
  • Renewable energy applications

Contact Vulcan Spring About A Custom Spring Solution



Type 301 stainless steel typically used for most applications. Other materials are required if current is to be carried through the spring.

Life Cycle & Force

The force of the spring should be equal to the requirement of the application. The normal tolerance for a constant force motor brush spring is +/- 10%.

End Details

Many standard tools are available to create the desired end detail for standard brush springs. Special end designs can be made for a nominal charge. Ask about our end detail solutions.

Mounting Methods

There are various mounting methods available based on your application, including single mounting and multiple mounting. Motor brush springs are typically mounted on a steel backplate that snaps into the motor frame next to the brush.