Abstract: A cooling fan with anti-friction shaft and bearing set, which is able to decrease the friction between a metal shaft and a corresponding bearing, and thereby is capable of both reducing the noise and extending the lifetime of a cooling fan. The metal shaft of the cooling fan is coated with a layer of ceramic material. The corresponding bearing is also made of ceramic material. The cooling fan has a compression portion to orient the ceramic coating of the metal shaft to correspond to the bearing. The metal shaft contacts the inner surface of the bearing with its ceramic coating. The cooling fan of the present invention is thereby able to perform a high speed operation without generating noise.

Abstract: A fan structure of the present invention has a base having a first supporting piece, a motor stator mounted on the base, a motor rotor defined corresponding to the motor stator, a fan blade having a hub located at a central portion thereof, one end of the hub abutting the first supporting piece. The motor rotor is mounted on an inner wall of the fan blade. An upper cover body covers a periphery of the fan blade, the upper cover body has an oblique resilient portion defined on a top portion thereof, the resilient portion defines a second support piece thereon, and the second support piece abuts another end of the hub. The improved fan structure is a bearingless structure, which can simplify the overall structure, is easy to assemble, effectively reduces manufacturing costs and improves a rotating stability of the hub.