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Roller bearing lifetime behavior can be recorded by trending characteristic Vibration values. After the infancy portion of the bathtub curve has been overcome, the bearing will operate normally for years but once the deterioration kicks in, one will see the trend increase. The typical trend behavior is a steep increase for weeks before the defect area flattens out which then points to a remaining lifetime of days before total failure occurs. It helps to find the optimal time to replace the bearing.

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