Bearing Envelope Analysis Bearing Envelope Analysis (BEA) is a key technique in condition monitoring and predictive maintenance. Instead of directly observing raw vibration signals, this method uses band-pass filtering and demodulation to highlight vibration components associated with rolling element impacts. As a result, characteristic fault frequencies of the inner race, outer race, rolling elements, and cage become clearly visible, enabling fast and reliable diagnostics in real industrial environments. In production settings, distinguishing between normal vibration and fault-related vibration is a major challenge. BEA provides high diagnostic value by separating vibration components directly linked to mechanical impacts, helping engineers not only detect “a fault exists,” but also identify the fault type and severity.
When combined with a bearing database, characteristic fault frequencies can be automatically calculated and displayed, significantly reducing analysis time. Trending envelope amplitude over time enables evaluation of fault progression speed and more accurate maintenance planning. With early detection, organizations can avoid secondary damage, reduce repair costs, and minimize unplanned downtime. BEA therefore becomes an essential tool in modern condition-based monitoring systems.
