Single row tapered roller bearings consist of an outer ring and an inner ring. The inner ring is a set of tapered rollers surrounded by a basket-shaped cage, and the outer ring can be separated from the inner ring assembly. According to the ISO tapered roller bearing dimensions standard, any standard type of tapered roller bearing outer ring or inner ring assembly should be able to be interchanged with the same type of outer ring or inner ring assembly. That is, the outer ring of the same model must meet the requirements of ISO492 (GB307) in addition to the external dimensions and tolerances. The taper angle of the inner ring assembly and the diameter of the component cone must also comply with the relevant provisions of the interchange.