If non-synchronous harmonics with 1X sidebands are detected but the frequency does not match the bearing frequencies, what should you do?

The selected answer emphasizes the importance of considering the overall context of vibration analysis when non-synchronous harmonics with 1X sidebands are detected. Non-synchronous harmonics can indicate potential issues in the system, even if they do not directly correspond to the specific frequencies associated with known bearing faults.

When analyzing vibration data, it's essential to evaluate all forms of harmonic content and their implications. The presence of non-synchronous harmonics, particularly with 1X sidebands, suggests that there might be an underlying issue that warrants further investigation. Therefore, assuming that a bearing has a fault condition, despite the absence of a frequency match, is an appropriate course of action. It prompts the technician or analyst to conduct thorough checks or diagnostics to uncover any potential failure modes that could affect bearing performance.

By taking this cautious approach, the technician remains proactive in identifying and addressing possible issues, ensuring that no potential fault goes unexamined. This approach aligns with best practices in vibration analysis, where a thorough understanding of the system and its symptoms is essential for effective maintenance and reliability assurance.

In contrast, simply ruling out a fault condition prematurely—such as assuming the detected harmonics relate to nearby machinery—could lead to missed opportunities for preventative maintenance, and neglecting to