BPFI
UnclassifiedEmissions
What This Code Means
High frequency peaks in spectrum; High frequency vibration; Periodic but non-sinusoidal impacting waveform; Excessive 'g swing' with sharp impacting spikes resembling an angle fish pattern; Periodic characteristic diminishes with advanced degradation; High-frequency/low-amplitude non-synchronous peaks; Turning speed sidebands appearing around the race defect frequency; Broad energy 'mounds' or 'grass' in spectrum (indicating advanced degradation); Cage frequency sidebands centered around 1 or 2 times BSF fault frequency
Possible Causes
- •Excessive lubrication
- •Inadequate lubrication
- •Improper mounting methods
- •Improper application
- •Excessive vibration before and/or after installation
- •Excessive load
- •Age of bearing
- •Improper storage & handling
- •Manufacturing defects
Suggested Actions
- 1View the spectrum in acceleration to see high frequency peaks
- 2Perform high frequency vibration analysis to detect lack of lubrication
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