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Practical Solutions to Machinery and Maintenance Vibration Problems

Chapter 8, Vibration in Bearings

Section 8, Further Considerations for Bearing Defect Vibration Amplitude and Frequency Symptoms

As vibration amplitudes due to bearing problems are often relatively small when compared to other vibration sources, "threshold-type" alarms that measure "overall" vibration do not usually give adequate warning for impending bearing failure. Instead, "power band-type" alarms, which measure "root mean square" (rms) values, are most often more appropriate as they give a better idea of "vibration defect energy."


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