Attempting to balance an Air King high velocity fan, model 9218.. The blade does shake substantially when running.. While a small portion of that can be due to the blades being out of alignment, in this case the majority of the issue is resulting from the blade not being machined with enough precision.. It appears that the hole for the shaft was not centered properly into the blade's hub, causing it to be out of balance.. Because this fan has ball bearings, the additional vibration will likely not cause any issues with the fan in terms of longevity as ball bearings are a lot more durable than sleeve bearings, however it is still a nuisance to have it shake during operation considering how much the fan costs..
Attempting to Balance an Air King High Velocity Fan
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