GB/T 13487-2017 English PDF (GBT13487-2017)

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GB/T 13487-2017: Synchronous belts for general drive
GB/T 13487-2017
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 21.220.10
J 18
Replacing GB/T 13487-2002
Synchronous belts for general drive
ISSUED ON. MAY 12, 2017
IMPLEMENTED ON. DECEMBER 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.
3. No action is required - Full-copy of this standard will be automatically and
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Table of contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Product classification ... 5 
4 Structure and materials ... 6 
5 Identification ... 8 
6 Technical requirements ... 8 
7 Test method ... 10 
8 Inspection rules ... 11 
9 Marking, packaging, transportation and storage ... 11 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard replaces GB/T 13487-2002 “Synchronous bets for general drive”.
Compared with GB/T 13487-2002, in addition to editorial changes, the main
technical changes are as follows.
- MODIFY the scope description (SEE Chapter 1);
- ADD the standard in the normative references (SEE Chapter 2);
- MODIFY the product classification (SEE Chapter 3);
- MODIFY the synchronous belt structure and material description (SEE
Chapter 4);
- ADD the double-sided tooth synchronous belt structure diagram (SEE
Figure 1);
- MODIFY the synchronous belt marking method (SEE Chapter 5);
- ADD the physical performance of the synchronous belts MXL, XXL, T2.5,
T5, T10, T20, S3M, S5M, S8M, S14M, S20M, H3M, H5M, H8M, H14M,
H20M, R3M, R5M, R8M, R14M and R20M (SEE Table 1);
- MODIFY the physical performance requirements of the synchronous belt
(SEE 6.2);
- MODIFY the belt back hardness requirements (SEE Table 1);
- MODIFY the appearance quality requirements (SEE 6.3);
- MODIFY the sampling rules (SEE Chapter 8);
- MODIFY the marking, packaging, and storage requirements (SEE Chapter
9).
This standard was proposed by the China Machinery Industry Federation.
This standard shall be under the jurisdiction of the National Roller and
Standardized Technical Committee (SAC/TC 428).
The drafting organizations of this standard. Ningbo Kaichi Belt Co., Ltd., China
Productivity Center for Machinery, Ningbo Jiebao Group Co., Ltd., Ningbo
Jinmao Far East Rubber Co., Ltd., Henan Jinjiulong Industrial Co., Ltd.,
Jiangsu Pearl Testing Machinery Co., Ltd., Zhejiang Sante Technology Co.,
Ltd.
Synchronous belts for general drive
1 Scope
This standard specifies the product classification, structure and materials,
identification, technical requirements, test methods, inspection rules and
marking, packaging, transportation and storage of synchronous belts for
general drive (hereinafter referred to as synchronous belts).
This standard applies to the synchronous belts for general industry.
This standard does not apply to automotive synchronous belts.
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 Standard.
GB/T 10716 Synchronous belt drives - Automobile belts – Determination of
physical properties
GB/T 11616 Synchronous belt drives – Belts with pitch codes - MXL, XXL, XL,
L, H, XH and XXH - Synchronous belt dimensions
GB/T 24619 Curvilinear toothed synchronous belt drives
GB/T 28774 Synchronous belt drives – Metric pitch – Trapezoidal toothed
synchronous belts
JB/T 7512.1 Circular tooth synchronous belt drive - Part 1. belt
3 Product classification
The type of the synchronous belt is divided into single-sided teeth and
double-sided teeth based on the teeth distribution, and the double-sided teeth
are further divided into symmetrical teeth and staggered teeth. AND the
synchronous belt is divided into trapezoidal teeth, curvilinear teeth and circular
teeth based on the tooth shape.
Trapezoidal tooth synchronous belt is divided into 11 models. T2.5, T5, T10,
T20, MXL, XXL, XL, L, H, XH, and XXH.
Curvilinear tooth synchronous belt is divided into 3 types. H, S, R; AND it is
divided into 5 pitches (totally 15 models). 3M, 5M, 8M, 14M, and 20M based on
the tooth pitch.
4.2 Materials
4.2.1 Belt body
The belt body includes the belt back and the belt teeth, which shall use the
corresponding rubber materials.
4.2.2 Core rope
Core rope uses high modulus skeleton material, AND core rope center line
shall be located in the pitch line position.
4.2.3 Tooth cloth
Tooth cloth uses high abrasion resistance textures, the density of its warp and
weft shall be uniform, AND its yarn shall be free from such defects as
incompleteness or skewing.
5 Identification
Trapezoidal tooth synchronous belt shall be identified in accordance with the
requirements of GB/T 11616 and GB/T 28774; the curvilinear tooth
synchronous belt shall be identified in accordance with the requirements of
GB/T 24619; AND the circular tooth synchronous belt shall be identified in
accordance with the requirements of JB/T 7512.1.
6 Technical requirements
6.1 Dimensions
The dimensions and limit deviation of the trapezoidal tooth synchronous belt
shall comply with the provisions of GB/T 11616 and GB/T 28774. The
dimensions and limit deviation of the curvilinear tooth synchronous belt shall
comply with the provisions of GB/T 24619. The dimensions and limit deviation
of the circular tooth synchronous belt shall comply with the provisions of JB/T
7512.1.
6.2 Physical performances
6.2.1 The physical performances of single-tooth synchronous belt shall comply
with the provisions of Table 1.
The test of the tensile strength, the hardness of the belt back, the bonding
strength of the tooth cloth, the strength of the core rope, and the shear strength
of the tooth body of the synchronous belt is in accordance with the methods of
GB/T 10716.
7.3 Appearance quality
The appearance quality of the synchronous belt is visually inspected, AND the
pinhole is measured by a 0.8 mm special measuring column.
8 Inspection rules
8.1 Each performance testing of the synchronous belt shall be carried out by
the quality inspection department of the manufacturer.
8.2 The appearance quality of the synchronous belt shall be checked one by
one, BUT the main dimensions may be spot checked.
8.3 The synchronous belt of the same model and same material shall be
subjected to at least one physical performance test a month.
8.4 In the case of unqualified items in the test, double test samples shall be
taken from the same batch of synchronous belts for the unqualified item test. If
there is still one item fails in the re-test, this batch of products will be deemed
as disqualified.
9 Marking, packaging, transportation and storage
9.1 Marking
There shall be a clear marking on the synchronous belt which is not erasable
by water (and it may use hanging tag to substitute such marking if it cannot be
made). The marking includes the following.
a) Marking;
b) Manufacturer or trademark;
c) Production date or lot number;
d) “No folding” or other words on the requirements of use.
9.2 Packaging
During packaging of the synchr...