In spectrum analysis for bearing faults, which signature identifies an outer race defect?

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Multiple Choice

In spectrum analysis for bearing faults, which signature identifies an outer race defect?

Explanation:
In spectrum analysis for bearing faults, each damaged part of the bearing creates vibration energy at a specific, geometry-based frequency. An outer race defect produces impulses every time a rolling element passes the defect, so the spectrum shows distinct peaks at the outer race defect frequency (often labeled BPFO) and its harmonics. This pattern—clear lines at the outer race defect frequency—is the telltale signature of outer race damage. By contrast, inner race defects would show peaks at the inner race defect frequency, cage defects at the cage frequency, and random noise lacks these discrete, recurring lines.

In spectrum analysis for bearing faults, each damaged part of the bearing creates vibration energy at a specific, geometry-based frequency. An outer race defect produces impulses every time a rolling element passes the defect, so the spectrum shows distinct peaks at the outer race defect frequency (often labeled BPFO) and its harmonics. This pattern—clear lines at the outer race defect frequency—is the telltale signature of outer race damage. By contrast, inner race defects would show peaks at the inner race defect frequency, cage defects at the cage frequency, and random noise lacks these discrete, recurring lines.

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