How does a decibel (dB) or logarithmic graph scale aid in bearing analysis?

A decibel (dB) or logarithmic graph scale significantly enhances the analysis of bearing vibrations because it allows for the identification of low amplitude peaks even in the presence of much higher amplitude signals. This capability is crucial when diagnosing issues in machinery, particularly bearings, as they can produce subtle failure indicators that might otherwise be overshadowed by dominant frequencies or higher amplitude signals from other sources.

In a linear scale, small vibration signals can be masked by larger ones, making it difficult to assess their importance or identify potential faults. However, using a logarithmic scale, the visual representation compresses the range of values, making it easier to discern those small peaks that could indicate early signs of bearing wear or failure.

This is especially important in predictive maintenance and vibration analysis, where catching issues at an early stage can save significant time and costs associated with unexpected breakdowns or extensive repairs. By providing a clearer view of these low amplitude signals, the logarithmic scale thus supports more accurate and effective monitoring of bearing conditions.