GB/T 273.3-2020 PDF English
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Rolling bearings - Boundary dimensions, general plan - Part 3:Radial bearings
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GB/T 273.3-2020: PDF in English (GBT 273.3-2020) GB/T 273.3-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.100.20
J 11
GB/T 273.3-2020 / ISO 15:2017
Replacing GB/T 273.3-2015
Rolling bearings – Boundary dimensions, general plan –
Part 3: Radial bearings
(ISO 15:2017, Rolling bearings – Radial bearings – Boundary dimensions, general
plan, IDT)
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: JUNE 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Symbols ... 6
5 Boundary dimensions ... 7
Appendix A (Informative) Extension rules for the general plan of boundary dimensions
of radial bearings ... 26
Bibliography ... 29
Foreword
GB/T 273, Rolling bearings - Boundary dimensions general plan, is divided into 3 parts:
-- Part 1: Tapered roller bearings;
-- Part 2: Thrust bearings;
-- Part 3: Radial bearings.
This Part is Part 3 of GB/T 273.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 273.3-2015 Rolling bearings - Boundary dimensions, general
plan - Part 3: Radial bearings. Compared with GB/T 273.3-2015, the main technical
changes are as follows:
-- Supplement the width values and minimum single chamfer dimensions of some
radial bearings in diameter series 8, 9, 0, and 1 (see Tables 2 ~ 5; Tables 2 ~ 5 of
the 2015 edition);
-- Expand the range of dimension section for radial bearings in diameter series 8, 9,
0, 1, 2, 3 and 4 (see Tables 2 ~ 8; Tables 2 ~ 8 of the 2015 edition);
-- Include some normative references in the bibliography (see Bibliography; Chapter
2 of the 2015 edition).
This Part is identical to ISO 15:2017, Rolling bearings - Radial bearings - Boundary
dimensions, general plan by using the translation method.
The documents of our country that have a consistent correspondence with the
international documents that are referenced in this Part are as follows:
-- GB/T 305-2019, Rolling bearings - Snap ring grooves and snap rings for radial
bearings - Dimensions, geometrical product specifications (GPS) and tolerance
values (ISO 464:2015, MOD)
-- GB/T 6930-2002, Rolling bearings - Vocabulary (ISO 5593:1997, IDT)
-- GB/T 20057-2012, Rolling bearings - Single-row cylindrical roller bearings -
Chamfer dimensions for loose rib and non-rib sides (ISO 12043:2007, IDT)
-- GB/T 20058-2017, Rolling bearings - Single-row angular contact ball bearings -
Chamfer dimensions for outer ring non-thrust side (ISO 12044:2014, IDT)
This Part makes the following editorial changes:
Rolling bearings - Boundary dimensions, general plan - Part
3: Radial bearings
1 Scope
This Part of GB/T 273 specifies the preferred boundary dimensions of radial bearings
in diameter series 7, 8, 9, 0, 1, 2, 3 and 4.
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 of the referenced document (including any amendments) applies.
ISO 464, Rolling bearings - Radial bearings with locating snap ring - Dimensions,
geometrical product specifications (GPS) and tolerance values
ISO 5593, Rolling bearings - Vocabulary
ISO 12043, Rolling bearings - Single-row cylindrical roller bearings - Chamfer
dimensions for loose rib and non-rib sides
ISO 12044, Rolling bearings - Single-row angular contact ball bearings - Chamfer
dimensions for outer ring non-thrust side
3 Terms and definitions
For the purpose of this document, terms and definitions given in ISO 5593 apply.
ISO and IEC maintain terminological databases for use in standardization at the
following addresses:
-- ISO Online browsing platform: available at https://wwwi.so.org/obp
-- IEC Electropedia: http://www.electropedia.org/
4 Symbols
For the purpose of this document, the following symbols, as well as those given in
ISO15241[3], apply to this document.
...... Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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