>> P.81
VarnishgasWhenapplyingvarnishtothemotorcoil,thegasemittedwhiledryingwillgeneraterust.Abnormalnoisemayalsooccur.Environmentalstresscracking(ESC)Whenthebearingassemblypartisresin,theoiltypemayleadtoenvironmentalstresscracking(ESC).•ConfirmingresinmaterialsThelikelihoodofenvironmentalstresscracking(ESC)variesaccordingtotheresinmaterialtype.•ConfirmingfittoleranceHighstrainismorelikelytoleadtoenvironmentalstresscracking(ESC).EffectsofmagnetizationDonotmagnetizethebearings.Magnetizationwillgatheriron-basedcontaminationandgenerateabnormalnoiseandmisalignment(assemblyprecisiondefects).81