Direct-connected fan
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I’m looking for the tolerance specifications for the fit between the inner hole of a direct-connected fan impeller and its shaft; the shaft diameter is 60. Does anyone have any standards available? It would be great if you could share them
It depends on the specific type of fan and the operating conditions; there is no uniform standard, so one can only ask the manufacturer to provide the accompanying documentation. The impeller and shaft are generally fitted with an interference fit; the exact degree of interference depends on the operating temperature of the fan and the way in which the impeller is fixed. It is best to consult the manufacturer for this information.