Bent Shaft

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Bent Shaft

Vibration Source

Exciting Frequency

Dominant Plane

Amplitude

Envelope Characteristics

Comments

Slightly Bowed

Shaft

1X , 2X

axial, radial, tangential

steady

narrow band

Run-out @ rotor mass appears as imbalance.

Shaft Bent at

Coupling

1X, 2X

axial, radial, tangential

steady

narrow band, maybe with

2X, 3X harmonics

Run-out @ coupling appears as misalignment

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