Speaking of "Waterproof Cooling Fan", we have to mention that the fan works and its core "bearing" Often fan is mainly composed of two parts of the stator and the rotor, the stator comprising main circuit, bearings, coils. The main rotor blades containing magnets and the shaft. Currently in this computer fan bearings are mainly divided into two categories: oil shafts, ball. Both bearings will have a very good representative of the product, of course, each have their own shortcomings, it can not be denied. Changed the way ball bearing friction, rolling friction, this approach is more effective in reducing the friction between the bearing surface phenomenon, effectively increasing the "Waterproof Cooling Fan" bearing life, and therefore the use of the radiator life expectancy. Shortcomings "Waterproof Cooling Fan" is brought more complex process, leading to cost increase, it also brings higher operating noise.