This Standard lays down preferred boundary dimensions for radial bearings.
This Standard is not applicable to the tapered roller bearings, insert bearings and some types of needle roller bearings, airframe bearings and instrument precision bearings with standardized dimensions.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB/T 274-1991 Rolling Bearings — Chamfer Dimension Limits
GB/T 321-1980 Preferred Numbers and Preferred Number Series
3 Symbols and Abbreviated Terms (see Figure 1)
GB/T 273.3-1999 The following standards are cited：
