08/28/2026
Every failing bearing leaves a signature in the vibration spectrum.
Outer Race (BPFO), Inner Race (BPFI), Rolling Elements (BSF), and Cage (FTF): Each component generates a specific failure frequency, and the spectrum shows which one is degrading.
The order in which these frequencies appear indicates the stage. BPFO appears early and with clear amplitude. FTF is the most difficult to identify, and by the time it appears, the damage has already spread across the set.
When the rolling starts to make noise, all this progression has already happened.
And in your company, what is the trigger for changing the bearing?