As requested by Angel:

"Post a picture of the FFT.

Do you have forced air central heating?

regards,

Angel"

No I don't have any heating in the shop it is a 20 x 40 about 100 ft from my house.

 Here is a 10 minute clip at peak noise with WinQuake. 
 https://home.comcast.net/~bryangoss/peak.jpg

Here is the same clip FFT. I put a v where the curser was.
https://home.comcast.net/~bryangoss/FFT.jpg

Also Thank you all for helping the links you sent will help Bob.
and as Chris sugested I may change my pivot point to a ball bering.


> Bryan,
> 
> Post a picture of the FFT.
> 
> Do you have forced air central heating?
> 
> regards,
> 
> Angel
> 
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