This part of GB/T 273 specifies the main dimensions of one-way and two-way flat bottom thrust bearings. In addition, this part also specifies the minimum inner diameter of the seat ring and the maximum outer diameter of the shaft ring for the size series 11, 12, 13, 14, 22, 23 and 24 bearings. This part also stipulates the extended rules for the general scheme of the overall dimensions of one-way thrust bearings, see Appendix A.
GB/T 273.2-2006 Referenced Document
GB/T 274-2000 Rolling bearings-Chamfer dimension-Maximum values