Both bearings will have a very good representative of the product, of course, each have their own shortcomings, it can not be denied. Note "Mini Air Cooling Fan" routine maintenance. To maintain its good performance, avoid fan deformation, vibration occurs, which to some extent, in favor of energy saving. Speaking of fans, we have to mention that the fan works and its core "bearing" Often "Mini Air Cooling Fan" fan is mainly composed of two parts, a stator and a rotor, the stator comprising main circuit, bearings, coils. The main rotor blades containing magnets and the shaft. Currently in the computer "Mini Air Cooling Fan" piece bearings are mainly divided into two categories: oil shafts, ball.