Why are oil-contained cooling fans prone to noise?

Cooling fans are classified according to their bearings. They are mainly oil-impregnated bearings and double-ball bearings. However, it seems that oil-impregnated cooling fans are more prone to noise problems. Why? Oil-impregnated bearings have poor materials, rough craftsmanship, and poor precision. This is the reason that long-term use of oil-impregnated cooling fans is prone to produce noise. The sound is very good at the beginning because there is lubricating grease between the bearing and the shaft, which slows down The direct friction between the shaft core and the bearing is eliminated. But as time goes by, the lubricating oil will dry out, and when it is gone, the sound will become louder. The precision of the double ball bearing is very high. It is made of steel. From the beginning, what kind of sound will be the same one or two years later. This is also a product that has been used for a long time and has high requirements for noise. The reason for the double ball bearing fan instead of the oil-bearing cooling fan. Welcome to the heat dissipation classroom and news center of the cooling fan manufacturer again. The copyright belongs to the cooling fan manufacturer and represents only personal opinions. Please do not reprint the whole article. Any violation will be held for legal responsibility. If you need to know more about the cooling fan manufacturer's product introduction, please Click Product Center