With regard to the matching system, when to choose the base hole system, when to choose the basic shaft system, what are the basis for selection?
At this time, the base shaft system (for example, the outer diameter of the rolling bearings is matched with the holes is the shaft system fit).
In exceptional cases, the upper and lower deviations of the shaft, such as the shaft, are not allowed to change
Since the hole is difficult to process, the shaft is easy to process, so choose the base hole system when choosing the matching system
