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The material for commutator Brushes is generally

  • The material for commutator Brushes is generally Carbon.
  • Carbon brushes are preferred for use in DC machines because they are relatively soft, which allows them to conform to the shape of the commutator, reducing wear and sparking.
  • They are also good electrical conductors, have a low coefficient of friction, and are resistant to heat, making them well-suited to the high-speed, high-temperature environment of DC machines.
  • In addition to carbon, other materials such as graphite, metal-graphite, and electro-graphite are also used for commutator brushes in some applications, depending on factors such as the operating conditions and the specific requirements of the machine.
  • However, carbon brushes remain the most widely used material for commutator brushes in DC machines.