A brush is an electrical conductor subject to friction: therefore, it is a mechanical and electrical device that has the function of transferring a current, that may be very variable, between the rotating part of a machine and its fixed external power supply or load circuit.The brush works correctly within a fairly wide or narrow range of speeds and electrical loads, the limits of which depend on the material and the assembly. Choosing a brush for an application consists of best matching its mechanical and electrical properties to the conditions of the machine.The machine itself must have suitable friction properties; this is particularly true for the commutator that is in contact with the brush.

    Carbon brushes are designed to provide maximum life, with minimal commutator or slipring damage, using the optimal carbon brushes for your motor or generator lengthens the time between carbon brushes changes.

Brush types

  • Electro-graphite
  • Resin bonded
  • Pitch bonded
  • copper impregnated
  • silver impregnated
  • cooper graphite