You should oil the motor bearings.
Attic fan motor oil.
They are in the very center where the fan shaft goes.
An electric fan is no different.
It is excellent for smaller electric fan motors because it helps to reduce friction when there is a moving surface.
To check if there s enough oil in the fan take a pipe cleaner and fold the end over 1 2 inch to.
You can make an electric fan last longer if you simply lubricate the motor on a regular basis.
An attic fan doesn t require annual maintenance.
Before you add the oil clean off the fan and oil hole using an all purpose cleaner.
This lubricant oil is produced by liberty oil products and it is a 100 synthetic oil compound.
There is a bearing on each end of the motor.
Yes 3 in 1 oil would be good to use.
Then slowly pour 1 2 ounces of oil into the oil hole.
The bottom one is under the very center silver spot in your photo and the other is where the shaft enters the motor on the top side.