I faced too high axial vibration at free run electro motor after change the bearing. (6 mm/s)overall vibration
The bearing is deep grove 6318.
FFT spectrums show 1x, 2x.
I have done phase analysis as following the result
The phase between (V1and V 2 ) was 180
The phase between (V1and H1)was 180.
The axial phase between DE and NDE was zero.
We have removed fan cover of the motor end; after that axial drop to 3 mm/s.
Pls, share your opinion.