GB/T 21559.2-2023 English PDF (GBT21559.2-2023)

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GB/T 21559.2-2023: Rolling bearings -- Linear motion rolling bearings -- Part 2: Static load ratings
GB/T 21559.2-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.100.20
CCS J 11
GB/T 21559.2-2023 / ISO 14728-2:2017
Replacing GB/T 21559.2-2008
Rolling bearings - Linear motion rolling bearings - Part 2:
Static load ratings
(ISO 14728-2:2017, IDT)
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: DECEMBER 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Symbols ... 12
5 Basic static load ratings ... 13
6 Static equivalent load ... 16
7 Static load safety factor ... 16
Bibliography ... 17
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020
Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents.
This document is Part 2 of GB/T 21559, Rolling bearings - Linear motion rolling
bearings. The following parts have been issued for GB/T 21559:
-- Part 1: Dynamic load ratings and rating life;
-- Part 2: Static load ratings.
This document replaces GB/T 21559.2-2008, Rolling bearings - Linear motion rolling
bearings - Part 2: Static load ratings. Compared with GB/T 21559.2-2008, except for
editorial changes, the main technical changes are as follows:
a) Change some figures (see Figure 2, Figure 4, Figure 8 and Figure 9; Figure 2,
Figure 4, Figure 8 and Figure 9 of the 2008 edition);
b) Change the calculation formula of k0i in Formula (1) (see 5.1.1; 5.1.1 of the 2008
edition).
This document is identical to ISO 14728-2:2017 Rolling bearings - Linear motion
rolling bearings - Part 2: Static load ratings.
Please note that some of the contents of this document may involve patents. The issuing
organization of this document is not responsible for identifying patents.
This document is proposed by China Mechinery Industry Federation.
This document is under the jurisdiction of National Technical Committee on Rolling
Bearing of Standardization Administration of China (SAC/TC 98).
Drafting organizations of this document: Luoyang Bearing Research Institute Co., Ltd.,
Zhejiang Jingjiu Bearings Industrial Co., Ltd., Harbin Bearing Group Co. Ltd., Henan
University of Science and Technology.
Main drafters of this document: Du Xiaoyu, Zhao Binhai, Yao Yongwei, Han Donghai,
Li Yunfeng, Zhang Bowen.
The previous versions of the documents which are replaced by this document are as
follows:
-- It was issued for the first time in 2008 as GB/T 21559.2-2008;
-- This is the first revision.
Rolling bearings - Linear motion rolling bearings - Part 2:
Static load ratings
1 Scope
This document specifies the calculation methods for the basic static load rating, static
equivalent load and static load safety factor of linear motion rolling bearings.
This document applies to linear motion rolling bearings manufactured from
contemporary, commonly used, high-quality, hardened bearing steel according to good
manufacturing methods and basically of conventional design regarding to the shape of
the rolling contact surfaces.
This document does not apply to designs in which rolling elements run directly on the
smooth surface of mechanical equipment, unless the surface is equivalent in all respects
to the raceway of the linear motion rolling bearing component it replaces.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
ISO 76, Rolling bearings - Static load ratings
Note: GB/T 4662-2012, Rolling bearings - Static load ratings (ISO 76:2006, IDT)
ISO 5593, Rolling bearings - Vocabulary
Note: GB/T 6930-2002, Rolling bearings - Vocabulary (ISO 5593:1997, IDT)
3 Terms and definitions
For the purpose of this document, the terms and definitions given in ISO 76 and ISO
5593, and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the
following addresses:
-- ISO Online browsing platform: https://www.iso.org/obp;