Bearing fluting observed on 1200 RPM induction motor, impacting with 10 G’s pk-pk.
This is something I've only ever seen in textbooks until now.
Bearing Fluting.
This is the Drive End Vertical reading on an 1200 RPM induction motor. Non synchronous peak with sidebands of BPFO. Impacting in the Time Waveform with 10 G's pk-pk.
It will be interesting to take this one apart to verify..