The bearing of the DC cooling exhaust fan, its core component, plays an important role, especially the high rpm exhaust fan, once its bearing temperature is too high, it is very likely to damage the bearing and shorten the service life of the fan.

There are several common possibilities regarding the causes of excessive temperature of exhaust fan bearings:

1、Poor lubrication: For example, if a double ball bearing exhaust fan uses poor quality lubricating oil or uses too little component, the friction of the bearing will generate more heat, resulting in higher bearing temperature.

2、Accessories problems: When we make a bldc exhaust fan start normal operation, but the quality of its rotating bearing accessories is not qualified, it will cause the connection between the bearing and the jacket to be too tight or too loose.

3、Improper installation: We have had the experience of making the sealing felt of a waterproof exhaust fan too tight, and as a result, the fan did not dissipate properly, resulting in heat.

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