Issues with bearing selection
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Can double-row angular contact bearings be used in combination with ordinary deep-groove ball bearings? Also, if the two 7310 bearings currently used at the coupling end of the pump can they be replaced with two 6310 bearings?
It is not recommended to replace it; deep groove ball bearings can only withstand a limited amount of axial load. If the residual axial force in the pump is high, the lifespan of the deep groove ball bearings will be short
Deep grooves can only withstand small bidirectional axial forces and are commonly used in small motors, whereas angular contact types can handle larger unidirectional axial forces; the magnitude of the loads is also different – one can find out the values of their dynamic loads by checking them
When using double-row angular contact bearings in combination with ordinary deep groove ball bearings, it is necessary to take into account the issue of over-positioning; for example, by reducing the number of retaining rings. Two 6310 bearings will certainly not have as long a service life as two 7310 bearings that are installed correctly!