1, lubricated bearings
"Cooling Fan Manufacturer" transport the most important parts is bearing a long time, lack of lubrication, it will produce noise when such high-speed rotation. Therefore, we only need a few drops on the fan bearing lubricant, if not using the sewing machine can replace. But be careful, do not use cooking oil instead, because of its relatively large particles, easy on the bearings injury.
2, the fixed blades
Vibration noise is also "Cooling Fan Manufacturer" an important part of the noise, because loose blades in the upper bearing and the bearing clearance becomes large abrasion, etc., so only need to remove the "Cooling Fan Manufacturer", the screw tightening knob, so firmly after firmly fixed, it will not shake.