Tag Archives: A carbon brush of dc motor

The carbon brush should be inserted into the brush holder so as to be able to move freely up and down. The gap between the carbon brush and the inner wall of the brush holder is between 0.1-0.3 mm to avoid swinging between the carbon brush and the brush holder due to excessive clearance. The distance from the lower edge of the brush holder to the surface of the commutator should be maintained at about 2 mm.