A quick reference for vibration spectra of rotor misalignment including parallel misalignment, angular misalignment and combination of both. Vibration direction, spectrum peak location and amplitude of each type all at one glance.

1. Parallel&Misalignment.
• High%radial%vibra,on%
• Radial%vibra,on%180%degrees%out%of%phase%
• 1X,%2X,%4X%radial%vibra,on%with%2X%dominant%
• Very%dependent%on%type%of%coupling%
Angular&Misalignment.
• High%axial%force%and%vibra,on%
• 180%degrees%phase%change%across%coupling%
• 1X,%2X,%3X%axial%vibra,on%with%1X%&%2X%dominant%
• Very%dependent%on%type%of%coupling%
%
General&Misalignment.
• Combina,on%of%parallel%and%angular%misalignments%%
• Axial%and%radial%both%show%the%frequency%components%
• Most%common%type%of%misalignment%
%
1X%
RPM%
Amplitude%%
2X%
Radial%3X%
1X%
RPM%
Amplitude%% 2X%
Axial%3X%
1X%
RPM%
Amplitude%%
2X%
Axial%&%Radial%
4X%
3X%
5X%
7X%
6X%
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