For several years predictive maintenance has been gaining popularity as a method for preventing costly and
time–consuming machine breakdowns. Vibration analysis is the cornerstone of predictive maintenance
programs, and theequationsforcalculating expected vibration frequenciesforbearingsand toothed gearsets
are widely available. Cycloidal reducers present a special case due to the nature of their reduction
mechanism. This paper will describe a method for utilizing vibration analysis in order to identify a defective
cycloidal ring gear housing, disc, and eccentric bearing.