Field case · Condition monitoring
Fan bearing: a vibration trend from 10 to 60 m/s² in two weeks, and fluting on the raceways at teardown
A 6326/C3 fan bearing showed acceleration rising from about 10 to nearly 60 m/s² in about two weeks. No spectrum was needed: after replacement the trend dropped and stayed low, and the raceways showed fluting from electrical erosion.
What the case covers
- The application
- What the trend showed
- The timeline
- Why the trend was the evidence
- What the teardown showed
- What to take from it
Takeaway. When a steady rise in acceleration drops straight back after a bearing change, the trend alone is evidence. If the raceways show fluting on both rings, find and stop the current as well as changing the bearing.
Read the full case, with the data and the numbers