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GB/T 301-2015 English PDF (GBT301-2015)

GB/T 301-2015 English PDF (GBT301-2015)

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GB/T 301-2015: Rolling bearings -- Thrust ball bearings -- Boundary dimensions

This Standard specifies boundary dimensions of single-direction and double-direction thrust ball bearings which conform to GB/T 273.2. This Standard applies to design and selection of bearings.
GB/T 301-2015
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 21.100.20
J 11
Replacing GB/T 301-1995
Rolling Bearings ?€? Thrust Ball Bearings ?€?
Boundary Dimensions
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ISSUED ON. DECEMBER 31, 2015
IMPLEMENTED ON. APRIL 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Application Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Symbols ... 4
5 Codes ... 6
6 Designation Example ... 6
7 Dimensions... 7
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 301-1995, Rolling Bearings ?€? Thrust Ball Bearings - Boundary Dimensions. Compared with GB/T 301-1995, the main technical changes of this Standard are as follows.
-- it adds normative references, terms and definitions and codes (see Chapter 2, Chapter 3 and Chapter 5);
-- it modifies part of symbols and definitions (see Chapter 4; Chapter 2 of 1995); -- it deletes the structural diagrams and dimensions tables (see Figure 3 to Figure 6 and Table 8 to Table 13 of Edition 1995);
-- it adds the types and dimensions of some bearings (see Table 1, Table 2 and Table 4 to Table 7); and
-- it deletes the annex of ?€?cross reference of structural type codes of old and new bearings?€? (see Annex A of Edition 1995).
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of the National Standardization Technical Committee on Rolling Bearings (SAC/TC 98).
The drafting organizations of this Standard. Harbin Bearing Group Corp., Luoyang Bearing Research Institute Co., Ltd. and Zhejiang Meiyate Precision Transfers Component Co., Ltd.
The main drafters of this Standard. Song Yucong, Yong Taifang, Zhou Youfeng, Jia Qiusheng and Weng Shixi.
The editions of the standard replaced by this Standard are as follows.
-- GB/T 301-1964, GB/T 301-1984 and GB/T 301-1995.
Rolling Bearings ?€? Thrust Ball Bearings ?€?
Boundary Dimensions
1 Application Scope
This Standard specifies boundary dimensions of single-direction and double-direction thrust ball bearings which conform to GB/T 273.2.
This Standard applies to design and selection of bearings.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Standard.
GB/T 272, Rolling Bearing ?€? Identification Code
GB/T 273.2, Rolling Bearings ?€? Thrust Bearings ?€? Boundary Dimensions General Plan
GB/T 274, Rolling Bearings ?€? Chamfer Dimension ?€? Maximum Values
GB/T 6930, Rolling Bearings ?€? Vocabulary
GB/T 7811, Rolling Bearings ?€? Symbols for Physical Quantities
JB/T 2974-2004, Rolling Bearings ?€? Identification Code ?€? Supplemental
Regulations
3 Terms and Definitions
For the purpose of this document, the terms and definitions defined in GB/T 6930 shall apply.
4 Symbols
The following symbols and those given in GB/T 7811 apply to this document. Unless specified otherwise, the symbols shown in Figure 1 and Figure 2 and the

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