Natural mechanical degradation measurements in slow speed bearings

M. Elforjani, D. Mba

    Research output: Contribution to journalArticlepeer-review

    33 Citations (Scopus)


    Acoustic emission (AE) technology applied to condition monitoring is gaining acceptance as a useful complimentary tool. This paper demonstrates the use of AE measurements to detect, monitor the growth and locate natural defect initiation and propagation in a conventional rolling element bearing. To undertake this task a special purpose test-rig was built to allow for accelerated natural degradation of a bearing race. It is concluded that crack initiation and its subsequent propagation is detectable with AE technology. The paper also investigates the source characterisation of AE signals associated with a defective bearing whilst in operation.

    Original languageEnglish
    Pages (from-to)521-532
    Number of pages12
    JournalEngineering Failure Analysis
    Issue number1
    Publication statusPublished - Jan 2009


    • Acoustic emission
    • Condition monitoring
    • Natural degradation
    • Thrust bearings


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