Overgreasing rolling element bearings in motors has been an industry problem for several years. More motors have bearing failures due to overgreasing than from undergreasing.
For the nuclear power generation industry in particular, the Nuclear Regulatory Commission (NRC) provided guidance and direction through the development of Information Notice 88-012, issued in July 1988, to address this problem. The method delivered mixed performance results for the amount of resources that companies have had to devote to motor relubrication, motivating some organizations to develop additional improvements.
Click link below for more information :
https://www.machinerylubrication.com/Read/339/motor-bearing-failure
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