Expert ForumsMotors and Drives

Topic: Re: Pump shaft size and driver relation

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I don't know of a rule of thumb for pump shaft diameter and doubt one exists as there are so many factors to be considered. Among these factors are: strength of shaft material; steps in the shaft (stress raisers); keyways and types of keyways (reduce strength); possible cyclic loading; radial/bending load; and torsional load.