This standard specifies the boundary dimensions of single-direction and double-direction cylindrical thrust roller bearings.
This standard is applicable to the design and type selection of single-direction and double-direction cylindrical thrust roller bearings.
2 Normative references
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 272 Rolling bearing - Identification code
GB/T 274 Rolling bearings - Chamfer dimension - Maximum values
GB/T 6930 Rolling bearings - Vocabulary
3 Terms and definitions
The terms and definitions given in GB/T 6930 apply.
4 Symbols
For the purposes of this document, the following symbols apply.
Unless otherwise stated, the symbols shown in Figures 1 and 2 and the values given in Tables 1 to 3 denote nominal dimensions.
D: the outside diameter of the housing washer
D1: the bore diameter of the housing washer
D1smin: the minimum single bore diameter of the housing washer
d: the bore diameter of bearing ring, single-direction bearing
d1: the outside diameter of bearing ring, single-direction bearing
d1smax: the maximum single outside diameter of the bearing ring
d2: the bore diameter of the central washer, double-direction bearing
d3: the outside diameter of the central washer, double-direction bearing
r: the back-face chamfer dimension of the bearing ring (single-direction bearing) and the housing washer
