This is a Centrifuge running at 2160 rpm. We are getting 1X harmontic of running speed. Ant ideas of what maybe going on?

Kind of centrifuge? Vert/Hor? Peaks are they speed multiples? Something loose? Is it a kind that "flush" one way or another, any device involved in that procedure flapping around? Olov

As Oli said, "what type"? First appearance is looseness or too much clearance.

Wad,

I have a little problem with your data. You are showing us an overall trend with a value of .527 ips pk. You have a spectrum that goes out to 110 kcpm in G's and a waveform that is 1/4 revoluition that is 0.07 ips 0-pk. There is obviously something missing in the waveform that would be of great help analyzing this data.

Why is your spectrum in acceleration and your waveform and trend in velocity? Typically, you'd want to view your spectrum in velocity for suspected mechanical defects; the acceleration spectrum attenuates the amplitudes of the lower order mechanical defects that you should be concerned about here. Also your waveform only shows 1/4 revolution; you need to have at least 4 or 5 revolutions to see if the problem is repeatable from rev to rev.

We can't do good analysis without good data, nor can you.