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Oct 12, 2018
The difference between the cooling fan ball bearing
The cooling fan has single ball and double ball bearings, which can be selected according to different needs. The following will introduce the difference between the two bearings.
single ball bearing
The single ball bearing adopts the form of sliding friction and ball friction. One ball bearing and oil-impregnated bearing are used to reduce the cost of the double ball bearing. The rotor and the stator are lubricated with balls, and lubricating oil is added. The service life is about 30,000-40,000 hours. .
Advantages: longer life than oil-impregnated bearings, stable operation, low cost
Disadvantages: Although the noise is small, the noise will increase for a long time
Double ball bearing
The double ball bearing is a high-end bearing. It adopts the form of rolling friction. There are two balls. The bearing has several tiny steel balls around the axis. When the fan blade or the axis rotates, the steel balls rotate along with it. Because it is a sphere, the friction force will be reduced. It is relatively small, and will not leak oil. It has a long service life and a service life of about 50,000-70,000 hours. It has good performance, high speed and large air volume.
Advantages: good sealing performance, long service life
Disadvantage: high cost
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