Medical equipment "DC Axial Fan" is currently the most common kind of computer cooling device mandatory. Cooling fan motor consists of several parts, bearings, blades and housing. Motor is the power source of the cooling fan, cooling fan speed level, momentum depends on the size of the performance of the motor. Ordinary "DC Axial Fan" cooling fan usually only a few dollars, and some high-end cooling fan has sold a few hundred dollars. A huge difference in price, not because of differences in the shape of the bearing type and fan airflow direction and other aspects, but mainly because of differences in heat "DC Axial Fan" on motor performance, a good cooling fan is critical to have a good motor.