1, shaft, and the choice of deep groove ball bearing chamber of tolerance and control: deep groove ball bearing pressure into the deep groove ball bearing should be flexible rotation without block. If there are any obvious rotation is not flexible, indicates the size of the shaft is too big, tolerance to downgrade. Such as deep groove ball bearing pressure into the shaft by hand after the rotation has obvious sasha vujacic feeling, may be the shaft or shaft roundness tolerance is too big. So in good control of axis and deep groove ball bearing chamber of tolerance when also want to control the roundness, at present many domestic manufacturers to control the tolerance only, not to control the roundness.

2, deep groove ball bearing assembly way: because of deep groove ball bearings are high precision products, such as improper assembly is easy to cause damage to deep groove ball bearing channel, lead to damage of deep groove ball bearings. Deep groove ball bearing should have special ? when it is assembled