GB/T 12939-2015 PDF in English
GB/T 12939-2015 (GB/T12939-2015, GBT 12939-2015, GBT12939-2015)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 12939-2015 | English | 130 |
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Rims for industrial vehicles
| Valid |
| GB/T 12939-2002 | English | 799 |
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Rims series for industrial vehicles
| Obsolete |
| GB/T 12939-1991 | English | 479 |
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4 days
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Rim contours for industrial trucks
| Obsolete |
Standards related to (historical): GB/T 12939-2015
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GB/T 12939-2015: PDF in English (GBT 12939-2015) GB/T 12939-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.99
G 41
Replacing GB/T 12939-2002
Rims for Industrial Vehicles
(ISO 3739-3.2008, Industrial Tyres and Rims – Part 3. Rims, NEQ)
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. APRIL 1, 2016
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 Rim Contour Dimension Codes ... 4
5 Rim Contour and Dimension ... 6
6 Rim Specified Diameter ... 13
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 12939-2002 Rims Series for Industrial Vehicles;
compared with 12939-2002, this Standard has the major technical changes as follows.
--- Modified the normative references (see Chapter 2);
--- Modified the terms and definitions (see Chapter 3);
--- Added the rim contour codes and diagrammatic views (see Chapter 4);
--- Increased part of 5° flat base rim (see Table 4, Table 5; Table 17 of 2002 Edition);
--- Increased 15° drop center rim (see 5.4);
--- Deleted part of rims (see 4.6, 4.7, 4.8, 4.11 of 2002 Edition);
--- Deleted Appendix A, Appendix B, and Appendix C from the previous version of
standard.
This Standard was prepared through adopting the re-drafting method and referring to
ISO 3739-3. 2008 Industrial Tyres and Rims – Part 3. Rims; this Standard’s
consistency degree with ISO 3739-3. 2008 is not equivalent.
This Standard was proposed by China Petroleum and Chemical Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Tyres and Rims (SAC/TC 19).
Drafting organizations of this Standard. Zhongce Rubber Group Co., Ltd., Shandong
Linglong Tyre Co., Ltd., Shantou Haoda Tyre Test Equipment Co., Ltd., Tianjin Jiurong
Wheel Tech Co., Ltd., Beijing Research & Design Institute of Rubber Industry, Triangle
Tyre Co., Ltd., and Guizhou Tyre Co., Ltd..
Chief drafting staffs of this Standard. Li Gongwu, He Jian, Chen Shaomei, Chen Xun,
Gu Zheng, Mu Shouyong, Hua Yingchun, Qiu Yi, and Chen Manxue.
The historical editions replaced by this Standard are as follows.
--- GB/T 12939-1991, GB/T 12939-2002.
Rims for Industrial Vehicles
1 Scope
This Standard specifies the contour terms, codes, contour shapes and dimensions for
rims of industrial vehicles.
This Standard is applicable to the rim specification series used by the pneumatic tyres
of the industrial vehicles.
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 2933 Wheels/Rims for Pneumatic Tyres – Nomenclature, Designation and
Marking
GB/T 6326 Tyre Terms and Definitions
3 Terms and Definitions
The terms and definitions stipulated in GB/T 2933 and GB/T 6326 are applicable to
this Document.
4 Rim Contour Dimension Codes
The rim contour dimension codes can refer to Figure 1.
Instructions.
NOTE 1. all dimensions marked with * are relevant to the mounting and dismounting of tyres
on rims; they are the minimum dimension on the groove bottom of rim; M indicates limit
dimension of the groove bottom position.
NOTE 2. groove top radius R4 and groove bottom angle a are the important parameters for the
mounting and dismounting of tyres on the rims.
NOTE 3. the mounting surface indicates where the tyre is mounted into the rim or the tyre is
dismounted. For multi-piece rims, the mounting surface indicates the side where the flange is
removable.
Figure 1 Rim Contour
D R
or
D F
Mounting Surface
A – rim specified width;
B – flange width;
C – position dimension of flange radius;
D – rim specified diameter;
F1, F2 – position dimension of valve hole on rim;
G – flange height;
DR, DF – bead seat round hump diameter;
L – groove bottom width;
M – position dimension of groove;
P – bead seat width;
R1 – flange bond radius;
R2 – flange radius;
R3 – bead seat radius;
R4 – groove top radius;
R5 – groove bottom radius;
R7 – groove side radius;
V – valve hole or groove dimension;
a – groove bottom angle;
β – bead seat angle.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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