[TheForge] A Balancing act

[Steve Bloom]

On 3/3/2015 8:01 PM, Bruce . wrote:
> I would have suspected the bearings, but you say you've checked the pillow
> blocks. I presume those are for the fan shaft.
>
> Did you check the motor bearings as well?  There are a lot of motors out
> there that need the bearings oiled.  It's amazing how noisy a fan motor can
> get.  Look for oil holes somewhere above the bearings, or felts immediately
> above the bearings.  You may have to use a bright flashlight to find them
> as they can be quite obscure.
>    
The motor without load is quiet and the fan is w/o bearings -- just 
clamped to a shaft.  I'll (shudder) pull the unit tomorrow and  try the 
knife edge idea.  The unit (w/o motor) is something like 70 lbs +...and 
I was a lot younger the last time I wrestled with it.  Progress report 
and pics on my web site tomorrow (I hope <grin>).

Steve