with the purpose of bearing and shaft or bearing is the inner and outer rings are firmly fixed to the shaft or bearing housing, so that mutual harmful sliding does not occur. As with the sliding surface, it will produce abnormal heat and wear, as well as due to wear and tear resulting powder into the bearing and cause early damage and vibration and other ills, leading to bearing can not fully exert its function. In addition, the bearing fit can affect the bearing radial clearance, radial clearance is not only related to the running accuracy of the bearing, also affect its life.

Three Thai SUNTHAI rolling bearing is a standard component, so when the relevant parts with its bore and OD are reference holes and the reference axis, in cooperation need not be labeled. When deciding the main problem is with the bearing outer ring load borne by the state.

In general, large size, load, vibration, high speeds or higher operating temperatures of some cases tight fit to be elected, and often is used to remove or swimming rings looser fit.