GB/T 290-2017 PDF in English
GB/T 290-2017 (GB/T290-2017, GBT 290-2017, GBT290-2017)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 290-2017 | English | 150 |
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Rolling bearings -- Needle roller bearings with drawn cup and without inner ring -- Boundary dimensions
| Valid |
| GB/T 290-1998 | English | 279 |
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Rolling bearings. Needle roller bearings, drawn cup without inner rings. Boundary dimensions
| Obsolete |
| GB 290-1989 | English | 239 |
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Rollings bearings--Needle roller bearings, drawn cup, without inner rings--Boundary dimensions
| Obsolete |
Standards related to (historical): GB/T 290-2017
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GB/T 290-2017: PDF in English (GBT 290-2017) GB/T 290-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.100.20
J 11
Replacing GB/T 290-1998
Rolling Bearings – Needle Roller Bearings with Drawn
Cup and without Inner Ring – Boundary Dimension
ISSUED ON. NOVEMBER 01, 2017
IMPLEMENTED ON. MAY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Symbols ... 4
5 Structure Type ... 5
6 Codes ... 6
7 Mark Example ... 6
8 Boundary Dimension ... 7
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 290-1998 Rolling Bearings – Needle Roller Bearings,
Drawn Cup without Inner Rings – Boundary Dimensions; compared with GB/T 290-
1998, this Standard had the major technical changes as follows besides the editorial
modifications.
--- Modify the standard name;
--- Add “Normative References” Clause, “Terms and Definitions” Clause, “Structure
Type” Clause, and “Code” Clause (see Clause 2, Clause 3, Clause 5 and Clause
6);
--- Add the symbol and code for the end thickness C2 of flat-bottom punched outer
ring (see Clause 4 and Table 1~Table 8);
--- Add two structure types and their boundary dimensions; namely, a sealed type
of needle roller bearing with drawn cup and without inner ring of which one side
has the seal ring; and open type of full-complement needle roller bearings with
drawn cup and without inner ring (oil-fat limit) (see Figure 4, Figure 6 and Table
2~Table 5);
--- Add the models and boundary dimensions for 71D, 22D, 32D serial needle roller
bearings with drawn cup and without inner ring – boundary dimensions.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Committee for Standardization
of Rolling Bearings (SAC/TC 98).
Drafting organizations of this Standard. Luoyang Bearing Science & Technology Co.,
Ltd., Suzhou Bearing Factory Co., Ltd., and Changzhou Dongfeng Bearing Co., Ltd.
Chief drafting staffs of this Standard. Zhang Fuwen, Zhang XiaoLing, Ge Jian, Wang
Huijuan, Dong Shujing, and Liu Wenmei.
The historical editions replaced by this Standard are as follows.
--- GB/T 290-1964, GB/T 290-1982, GB/T 290-1989, GB/T 290-1998.
Rolling Bearings – Needle Roller Bearings with Drawn
Cup and without Inner Ring – Boundary Dimension
1 Scope
This Standard specifies the boundary dimension for the needle roller bearings with
drawn cup and without inner ring (hereinafter referred to as needle roller bearings).
This Standard is applicable to the design and type-selection of bearings.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 272 Rolling Bearings – Identification Code
GB/T 6930 Rolling Bearings – Vocabulary
GB/T 7811 Rolling Bearings – Symbols for Quantities
3 Terms and Definitions
The terms and definitions stipulated in GB/T 6930 are applicable to this document.
4 Symbols
The following symbols and those stipulated in GB/T 7811 are applicable to this
document.
Unless otherwise is specified, the symbols shown in Figure 1~ Figure 9 and the values
shown in Table 1 ~ Table 8 are all nominal dimensions.
C. width of punched outer ring
C1. thickness of end on the forming bottom of the sealed type of punched outer ring
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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