"Mini Air Cooling Fan" mostly used oil bearings, the bearings are usually powder metallurgy products, tightly wrapped in the bearing outer linoleum should be stored a lot of oil, it gradually penetrate inside the bearing hole in lubrication. When the fan, motor produces heating, friction and heat between the shaft and bearing lubricants will gradually consumed. Such as lubricants are not duly added the "Mini Air Cooling Fan" can not maintain the normal operation of the motor will produce speed is reduced even clinging to the phenomenon of burning motor. Usually a fan during use, every 1-2 months should oiling oiling mouth, sewing machine oil or spindle oil can be used. "Mini Air Cooling Fan" in the gear box, use the grease (industrial Vaseline or calcium based grease). General was replaced every 3-4 years, should be replaced after the first shed housing, remove balance key, then unload the gear cover, with a small bamboo class lightweight tool to scrape the inside of the old grease, then wash with clean gasoline net, and then fill in the appropriate amount of new lubricants.