There is an ongoing debate on what tolerances are acceptable when aligning your rotating equipment. The debate falls on the “published tolerances” provided by the coupling manufacturers and the tolerances “recommended” by alignment equipment companies, reliability associations and rotating equipment OEM’s. The offset and angularity tolerances are much more permissive from the coupling manufactures than…
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Has this ever happened to you? You’re aligning a machine and your laser alignment system or dial indicator calculations tell you to add shims under the motor feet. You do what is expected, re-measure and you still have to add shims! Wonder why? I’ve heard it before, my laser doesn’t work or you calculated wrong.…
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While working on a sludge pump, several issues arose that could have caused alignment headaches that would have lasted hours. There isn’t any medication that would have removed that pain. In this scenario and all alignment jobs, Pre-Alignment is a MUST! I was asked to witness an alignment; a 400 HP motor driving a sludge…
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It is always the question with machine train shaft alignments: what needs to be moved? The best way to approach a multiple machine set shaft alignment project is to know where everything is and where everything needs to be. This particular auxiliary generator set has 10 pieces of rotating equipment to align. An induction motor…
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