The shaft and the bearing are capable of reducing vibration and noise of a motor. The shaft comprises: a shaft proper; and a sliding section provided to the shaft proper, the sliding section including carbon nano fibers or carbon nano tubes. On the other hand, the bearing comprises: a bearing proper;...http://www.google.es/patents/US20050052088?utm_source=gb-gplus-sharePatente US20050052088 - Shaft, bearing and motor
