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Reply to "High vibration in Fan Non DE bearing Horizontal direction"

To prove you do not have loose fits, use a long bar/block of wood/dial indicator. Put indicator at top dead center of the shaft and lift the shaft. If you have more than .003-.005" of up and down play, something is worn/loose

The harmonics in you vibration data indicates looseness, sources of looseness could be bearing fit to shaft or housing, loose bearing housing feet, loose fan base, worn coupling, fan wheel loose on shaft to name a few areas of interest

Have seen 3x come from loose bearing fits and coupling issues

Dave

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