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  1. #1
    Join Date
    Nov 2004
    up in the hizzy
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    whats normal shaft runout measurements?

    when using a dial indicator to measure shaft runout in a belt driven exhaust blower with a 26"X1" shaft what would be acceptable runout in thousand of an inch? I'm trying to figure at what point recommend shaft replacement.

  2. #2
    Join Date
    Nov 2011
    British Columbia
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    Most people don't concern themselves with this sort of thing for a small fan like this. If there's trouble, there would be other symptoms... vibration, bad bearings, noise... then troubleshoot from there.

    During maintenance, don't bother - unless its critical equipment for some reason.

    On open drive compressors, .001 to .003 is common.

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