Not Enough Lubrication: Servicing a Mainstays SFC1-500B High Velocity Fan

As with many fans sold today, the Mainstays SFC1-500B 20" high velocity fan does not come with enough lubrication. This will cause the bearings to wear out faster, or even the motor to lock up and fail. This is not a mistake-this is intentionally done so the fan doesn't last long, then you'll hopefully buy a new one when it quits. Here's how to fix this problem so you can keep the unit going for many more years.