GB/T 1171-2017 PDF English
US$150.00 · In stock · Download in 9 secondsGB/T 1171-2017: Classical V-belt for general drive Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 1171: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 1171-2017 | English | 150 |
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Classical V-belt for general drive
| Valid |
| GB/T 1171-2006 | English | 90 |
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Classical V-belt for general drive
| Obsolete |
| GB/T 1171-1996 | English | 279 |
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Classical V-belts for general use
| Obsolete |
| GB 1171-1989 | English | RFQ |
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Classical V-belts
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 1171-2017
GB/T 1171-2017: Classical V-belt for general drive---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1171-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.220.10
G 42
Replacing GB/T 1171-2006
Classical V-belt for general drive
Issued on. FEBRUARY 28, 2017
Implemented on. SEPTEMBER 01, 2017
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 Scope... 4
2 Normative references... 4
3 Structures... 4
4 Types and marks... 5
5 Requirements... 6
6 Sampling... 7
7 Test methods... 8
8 Marking, labeling, packaging, transportation and storage... 8
Annex A (informative) Reference rated power P1 and power increment △P1 of
a single piece of V-belt... 10
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 1171-2006 “Classical V-belt for general drive”.
Compared with GB/T 1171-2006, the main technical changes except editorial
modification are as follows.
- DELETE the requirements for adapting the rope structure in the scope (see
Clause 1 of this Standard, Clause 1 of 2006 edition);
- MODIFY the representation method for the mark (see 4.2 of this Standard,
3.3 of the 2006 version);
- DELETE the requirements for the adhesion strength of ropes in physical
properties and its test methods (see 5.3 of this Standard, 5.3 and 7.3 of
2006 edition);
- MODIFY the inspection of the dimensions in the sampling (see 6.1 of this
Standard, 6.1 of 2006 edition);
- ADD the tables of reference rated power P1 and power increment ΔP1 of a
single piece of V-belt (see Annex A).
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of Subcommittee on Friction-type
Belt Drive of National Technical Committee on Pulleys and Belts of
Standardization Administration of China (SAC/TC 428/SC 3).
Drafting organizations of this Standard. Sanlux Co., Ltd., Zhejiang Sanwei
Rubber Item Co., Ltd., Zhejiang Hongda Rubber Co., Ltd., Wuxi Zhonghui
Rubber Technology Co., Ltd., Ningbo Kaichi Rubber Belts Co., Ltd., Qingdao
Product Quality Supervision and Testing Research Center.
Main drafters of this Standard. Shi Shuixiang, Liu Youliang, Dai Jianqiu, Zhu
Shusheng, Ying Jianli, Li Xiaodong.
The previous released versions replaced by this Standard are as follows.
- GB 1171-1974, GB 1171-1989, GB/T 1171-1996, GB/T 1171-2006.
Classical V-belt for general drive
1 Scope
This Standard specifies the structure, types and marks, requirements, sampling,
test methods and marking, labeling, packaging, transportation and storage of
classical V-belts (hereinafter referred to as V-belts) for general drive.
This Standard applies to classical V-belts used for general mechanical drive
devices.
This Standard does not apply to mechanical drive devices such as automobiles
and motorcycles.
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.
GB/T 3686 Belt drives - V-belts and V-ribbed belts - Tensile strength and
elongation test method
GB/T 11544 Belt drives - Classical and narrow V-belts - Dimensions (system
based on datum width)
GB/T 12833 Rubber and plastics - Analysis of multipeak traces obtained in
determinations of tear strength and adhesion strength
3 Structures
3.1 V-belts are divided into two types according to the structure. wrap-edge V-
belt, cut-edge V-belts (classical cut-edge V-belts, grooved cut-edge V-belts and
bottom-rubber-embedded-cloth cut-edge V-belts).
4 Types and marks
4.1 Types
The V-belt shall have a symmetrical trapezoidal cross-section, of which the ratio
of height to pitch width is about 0.7.It is divided into seven types. Y, Z, A, B, C,
D and E.
5 Requirements
5.1 Appearance quality
The appearance quality of V-belts shall comply with the specifications of Table
1.
5.2 Dimensions
The reference length limit deviation, exposed height, center distance variation,
and matching difference of V-belts shall comply with the specifications of GB/T
11544.
5.4 Fatigue performance
For A-type and B-type V-belts, the torque-free fatigue life is not less than 1.0 ×
107 times, and the 24 h center-to-center distance change rate is not more than
2.0 %.
6 Sampling
6.1 V-belts shall be inspected for appearance quality one by one. They may be
sampled for inspection of dimensions.
6.2 The V-belts of the same type and the same material shall be in a batch of
not more than 200000 pieces.
6.3 If there are any unqualified items in the appearance quality, dimensions and
physical properties of V-belts, double-quantity samples shall be taken in this
batch to re-test the unqualified items.
6.4 For A-type and B-type V-belts of the same type and the same material, two
samples shall be taken for the fatigue test of V-belts. If there is any unqualified
item, two additional samples shall be taken in the batch.
6.5 In the event of changing the line of production, transferring the factory,
resumption of production after production stoppage, or a major change in
structure, material or process, the V-belts shall be subjected to the type
inspection.
7 Test methods
7.1 For the appearance quality of V belts, the damage of the angled canvas
and the length of the flash are measured with a tape or a caliper, and the rest
are checked by visual inspection.
7.4 For the adhesion strength test between cloth and top rubber, first cut two
samples on the top of the V-belt.
7.5 The no-torque fatigue life and pulley center-to-center distance change rate
of V-belts is tested in accordance with the specifications of GB/T 15328.
8 Marking, labeling, packaging, transportation and storage
8.1 Marking
Every V-belt shall be marked with clear sign that can't be washed away, which
shall include at least the following.
8.2 Labeling and packaging
V-belts shall be packed in suitable packages. The label shall include at least
the following.
8.3 Transportation and storage
8.3.1 During transportation and storage, V-belts shall be kept away from direct
sunlight or rain and snow, and kept clean;
8.3.2 During storage, the warehouse temperature should be kept at -18 °C ~
40 °C, and the relative humidity should not exceed 70 %.
Annex A
(informative)
Reference rated power P1 and power increment △P1 of a single piece of V-belt
When the wrap angle is 180° (i = 1), the specific reference length and load are stable, the recommended values of the reference
rated power of a single piece of V-belt are shown in Table A.1 to Table A.7.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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