"220V AC Cooling Fan" used bearing type shape. In mechanical engineering, bearing class shaped very much, but bearing in the form of the radiator products in use in accordance with the basic principles of classification will then work three: "220V AC Cooling Fan" using the sliding friction sleeve bearings and use a rolling two ball bearings and bearing friction mix of these three forms. In recent years, the major bearing manufacturers in terms of the radiator's new technology, "220V AC Cooling Fan" such as magnetic bearings, fluid protection system bearings, hydraulic bearings, bearing blessing, nano-ceramic bearings are also right on top of these basic bearings made to improve the form, the basic working principle is still no change.