Abstract: A fan shaft structure includes an annular groove portion, an end head adjacent to the groove portion, and several teeth equally spaced around the surface of the shaft. The annular groove portion, end head and teeth constitute an insert part of the fan shaft, around which the plastic fan blade is molded by insert molding. The present invention enables the center part of the fan blade to enwrap the insert part of the shaft, and firmly engage with the shaft. It is, therefore, not only able to enhance the robustness of the combination but also successful in preserving the adhesion effect between the shaft and the fan blade.

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 bearing used in small or mini-motor axis or driving shaft transmitted by the axis and a method of fabricating the same are disclosed. It is firstly obtaining a ceramic material, sintering the ceramic materials under high temperature to form a fine beads or powders, adding the beads or powders into heat-resisting plastic-steel plastic materials or metal to form a mixture, and molding the mixture to be a bearing by pressing.

Abstract: A fan shaft structure includes an annular groove portion, an end head adjacent to the groove portion, and several teeth equally spaced around the surface of the shaft. The annular groove portion, end head and teeth constitute an insert part of the fan shaft, around which the plastic fan blade is molded by insert molding. The present invention enables the center part of the fan blade to enwrap the insert part of the shaft, and firmly engage with the shaft. It is, therefore, not only able to enhance the robustness of the combination but also successful in preserving the adhesion effect between the shaft and the fan blade.