The edge is chamfered before use to ensure that the DC motor carbon brush will not be worn out. The same is true of commutators. While prolonging the service life, correct any abnormal conditions on the surface to prevent brush damage.

Immediately solve the vibration problems caused by poor alignment, poor operation or improper balance. These conditions can hinder good contact between the commutator and the carbon brush. If these problems are neglected, such as vibration, the carbon brush and the carbon brush holder will be seriously damaged.

It is necessary to ensure that there is a dust-proof groove on the carbon brush surface of DC motor. These grooves further improve their optimum state and performance. Use a suitable length of brush to adapt to constant pressure.

The whole length of DC motor carbon brush needs proper support. Brushes also need special clearance to avoid wedging. The International Electrotechnical Commission (IEC) stipulates the necessary clearances for different brush sizes. This decision prevents hammering or wedging.

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