Q:What Is The General Fit Between The Inner And Outer Ring Of Bearings And The Shaft
A:It is generally an interference fit.
According to the direction and nature of the load acting on the bearing and which side of the inner and outer ring rotation, the load borne by each ring can be divided into rotating load, static load or non-directional load. The ferring bearing rotating load and non-directional load should be static fit (interference fit), and the ferring bearing static load can be transitional fit or dynamic fit (gap fit).
When bearing load is large or bearing vibration and impact load, its interference must increase. When using hollow shaft, thin-wall bearing box or light alloy, plastic bearing box, also must increase the amount of interference.
When high rotation is required, high-precision bearings should be used, and the dimensional accuracy of shaft and bearing box should be improved to avoid excessive interference. If the interference is too large, the geometry accuracy of the shaft or bearing box may affect the geometry of the bearing ring, thus impairing the rotation accuracy of the bearing.
Non-separation type bearing (such as deep groove ball bearing) inner and outer ring are static fit, bearing installation, disassembly is extremely inconvenient, it is best to use a dynamic fit of one side of the inner and outer ring.
