GB/T 283-2021 English PDF (GBT283-2021)

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GB/T 283-2021: Rolling bearings -- Cylindrical roller bearings -- Boundary dimensions
GB/T 283-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.100.20
CCS J 11
Replacing GB/T 283-2007
Rolling bearings - Cylindrical roller bearings - Boundary
dimensions
滚动轴承 圆柱滚子轴承 外形尺寸
ISSUED ON: DECEMBER 31, 2021
IMPLEMENTED ON: JULY 01, 2022
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Symbols ... 4
5 Code ... 7
6 Marking ... 7
7 Boundary dimensions ... 7
Appendix A (Normative) Boundary dimensions of non-reinforced cylindrical roller
bearings ... 18
References ... 27
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 283-2007 "Rolling bearings - Cylindrical roller bearings
- Boundary dimensions". Compared with GB/T 283-2007, in addition to editorial
changes, the main technical changes are as follows:
a) SUPPLEMENT the marking of dimensions Ew or Fw in some structural type
drawings (see Figure 2, Figure 3, Figure 5, Figure 6);
b) ADD the dimension B1 value of reinforced NH type bearings (see Table 1 ~ Table
4);
c) EXPAND the size range of some structural types (see Table 1 ~ Table 5; Table 1
~ Table 5 of the 2007 edition);
d) ADD the dimension dimensions of 10 series NJ type bearings (see Table 5);
e) ADD the dimension a value of some bearing models (see Table 6 and Table 8).
Please note that some contents of this document may involve patents. The issuing
agency of this document does not assume the responsibility for identifying patents.
This document was proposed by China Machinery Industry Federation.
This document shall be under the jurisdiction of National Technical Committee for
Standardization of Rolling Bearings (SAC/TC 98).
The drafting organizations of this document: Luoyang Bearing Research Institute Co.,
Ltd., Wuxi World Bearing Co., Ltd., Dalian Metallurgical Bearing Co., Ltd., Fujian
Yongan Bearing Co., Ltd., Zhejiang Wuzhou Xinchun Group Co., Ltd., CRRC Dalian
Locomotive and Rolling Stock Co., Ltd.
The main drafters of this document: Zhao Binhai, Du Xiaoyu, Qin Zhenshan, Wang
Dehui, Zheng Shihao, He Chengcheng, Zhang Shun.
This standard replaces the standard previously issued as follows:
- GB 283-1964, GB 283-1981, GB 283-1987, GB/T 283-1994, GB/T 283-2007;
- GB 284-1964, GB 284-1981, GB 284-1987;
- This is the fifth revision.
Rolling bearings - Cylindrical roller bearings - Boundary
dimensions
1 Scope
This document specifies the dimensions of cylindrical roller bearings and cylindrical
roller bearings without inner rings and outer rings that comply with GB/T 273.3-2020.
This document applies to the design and user selection of cylindrical roller bearings.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, for dated references, only the
version corresponding to that date applies to this document; for undated references, the
latest version (including all amendments) applies to this document.
GB/T 272-2017 Rolling bearings - Identification code
GB/T 274-2000 Rolling bearings - Chamfer dimension - Maximum values
GB/T 6930-2002 Rolling bearings - Vocabulary
GB/T 20060-2011 Rolling bearings - Cylindrical roller bearings, separate thrust
collars - Boundary dimensions
3 Terms and definitions
The terms and definitions defined in GB/T 6930-2002 apply to this document.
4 Symbols
The following symbols apply to this document.
Unless otherwise specified, the symbols shown in Figures 1 ~ 8, the values shown in
Tables 1 ~ 10, as well as Tables A.1 ~ A.9 in Appendix A, all represent nominal
dimensions.
Note: Figures 1 ~ 8 are only schematic diagrams, which do not show all structural details. There
are many variant structures of cylindrical roller bearings.