Detail of GB/T 20057-2012

Introduction of GB/T 20057-2012

Rolling bearings - Single-row cylindrical roller bearings - Chamfer dimensions for loose rib and non-rib sides 1 Scope This Standard specifies the minimum chamfer dimensions for loose rib and non-rib sides of single-row cylindrical roller bearings of diameter series 0, 2, 3, and 4 (except dimension series 24) as specified in ISO 15. Indication is given for those minimum chamfer dimensions that are identical to those in ISO 15. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendment) applies. ISO 15 Rolling bearings - Radial bearings - Boundary dimensions, general plan ISO 582 Rolling bearings - Chamfer dimensions - Maximum values ISO 5593 Rolling bearings - Vocabulary ISO 15241 Rolling bearings - Symbols for quantities 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5593 apply. 4 Symbols For the purposes of this document, the symbols given in ISO 15241 and the following apply. The symbols shown in Figure 1 and the values given in Table 1 denote nominal dimensions unless specified otherwise. d——bore diameter; r1——chamfer dimension; r1s min——smallest single chamfer dimension. 5 Dimensions Chamfer dimensions for loose rib and non-rib sides of cylindrical roller bearings of diameter series 0, 2, 3, and 4 are given in Table 1. The values given in Table 1 are valid for cylindrical roller bearings of standard design and E-design. Note: For radial cylindrical roller bearings, the E signifies that they are of the design having reinforced roller and cage assembly and increased radial load-carrying capacity.

Contents of GB/T 20057-2012

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Dimensions