1. Harmonics of (2*BSF) ~ 4.16 orders
Low magnitude harmonics of 2*BSF High magnitude FTF sidebands (6316 bearing)
FTF sidebands
FTF sidebands
FTF sidebands
FTF sidebands
Harmonics of (2*BSF) ~ 4.16 orders
Moral of the story – if you see 2*FTF spaced peaks, look for peak in between
7/14/2019

2. Acceleration TWF 2H position (stator frame)– periodic impacts 1388cpm = FTF. This one at normal point stator frame
7/14/2019

3. Zoom-in on 2H TWF shows separation of impacts close to 2. BSF (0
Zoom-in on 2H TWF shows separation of impacts close to 2*BSF (0.004 sec=25 per 0.1 sec) - somewhat inconclusive
7/14/2019

4. Spectrum MIB directly on bearing housing (11:12) looks same as MIB on stator frame (11:0). Small 2*BSF harmonics with large FTF sidebands
7/14/2019

5. Accel TWF at MIB direct on bearing housing, now “impacting” appears 2
Accel TWF at MIB direct on bearing housing, now “impacting” appears 2*FTF
7/14/2019

6. Zoom-in TWF direct on bearing housing – more of modulated appearanace and now peaks at 2*FTF instead of 2*FTF (!?).
7/14/2019

7. Zoom in further direct on brg housing shows 2
Zoom in further direct on brg housing shows 2*BSF impacts whose envelope peaks at twice FTF. 2*BSF spacing is conclusive
7/14/2019