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Flatness for Shaft Alignment-Revisited

A reader of our blog posted a comment stating that he could not cut a step shim to correct for angular soft foot, since it was not permitted in API standards. Which, naturally, made me do two things: • Look at API Standards, because, at least in my 33 years of aligning machinery, I have…

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Defining Level vs. Flat

In mechanical trades, most of us have been taught that most installed machines must be installed level and the bases must be flat. But contrary to what many of us think, level and flat are two completely different terms. Level simply means that the machine is parallel to earth, or horizontal. Flat means that the…

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