A condition whereby the axes of machine components are either coincident, parallel or perpendicular, according to design requirements, during operation.

Cold Alignment

The machine condition in which alignment procedures are normally performed, ie cold. There will be changes in cold to normal running conditions that should be allowed for during the aligment procedure so that the machine can expand into alignment during operation. This is also known as static alignment or primary alignment.


Distance between rotational centre lines at any given normal plane, usually measured at the coupling midpoint.

See also: Align, Angularity, Dodd Bars, Machinery Train, Optical Alignment, Rise Run, Secondary Alignment, Soft Foot.

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Subjects: Mechanical Engineering