If a machine is not aligned within the acceptable tolerance limits undue stress can cause increased heat and wear in couplings, seals and bearings which in turn can cause increases in unplanned downtime, energy consumption and necessary maintenance intervals. Suggested alignment tolerances can be determined in several ways. Most often acceptable machine tolerances are provided by the manufacturer of the machine, but general industry standards for alignment tolerances are also available. Industry standards for alignment tolerances should only be used if no other tolerances are prescribed by the machine manufacturer or if in-house standards do not exist. In the instance that a machine manufacturer requires an alignment tolerance tighter than that recommended by industry standards, the manufa.
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