Causes of Misalignment
The basic causes of misalignment are:
Movement of one piece of equipment relative to another due to thermal growth in one or both
machines.
Piping strain or strain induced by electrical connections.
Torsional movement taking placeat startup
or while operating.
Movement or settling of the foundation or baseplate.
Inaccurate or incomplete alignment procedures (human error).
Misboredcouplings.
Any one of the above conditions will dramatically affect the alignment of equipment. If more than one of
the conditions exists, the odds are highly against a machine running smoothly, quietly, or for any
appreciable amount of time. Only after all of the situations have been examined and corrected can a
craftsperson be assured of an accurate alignment job being achieved and maintained.
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