GB/T 14212-2010 PDF English
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| GB/T 14212-2010 | English | 285 |
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Motorcycle chains - Characteristics and test methods
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| GB/T 14212-2003 | English | 319 |
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Motorcycle chains-characteristics and test methods
| Obsolete |
| GB/T 14212-1993 | English | 479 |
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Motor cycle chains
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GB/T 14212-2010: Motorcycle chains - Characteristics and test methods---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/GBT14212-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.220.30
J 18
GB/T 14212-2010 / ISO 10190.2008
Replacing GB/T 14212-2003
Motorcycle Chains – Characteristics and Test Methods
(ISO 10190.2008, IDT)
Issued on: JANUARY 10, 2011
Implemented on: OCTOBER 1, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative References... 6
3 Motorcycle Chains... 6
3.1 Nomenclature of assemblies and components... 6
3.2 Designation... 7
3.3 Dimensions... 8
3.4 Performance requirements... 8
3.5 Marking... 11
4 Sprockets... 12
Annex A (Normative) Alternative Specification of Chain Sprockets for Use in
External Drives... 13
Annex B (Informative) Original Values... 21
Annex C (Normative) Method of Determining the Maximum Test Force, Fmax,
When Conducting a Dynamic Strength Conformance Test... 22
Foreword
This Standard uses translation method to equivalently adopt international standard ISO
10190.2008 Motorcycle Chains – Characteristics and Test Methods.
This Standard replaced GB/T 14212-2003 Motorcycle Chains – Characteristics and Test
Methods.
Compared with GB/T 14212-2003, the major technical changes of this Standard are as follows.
--- Add a new table of contents page and ISO introduction;
--- Made technical revisions to Figures 1, 2 and 3; and delete a double-row structural
diagram;
--- Made technical revisions to 3.4.3, adjusting the original pre-tension load value from 1/3
of the minimum tensile strength value to 30%;
--- Made technical revisions to 3.4.4, adjusting the original tolerance of the chain
measurement length from +0.15 0 % of the nominal length of the chain to +0.25 0 %;
--- Cancel the original standard's requirements for dynamic load test;
--- Made technical revisions to Table 1, adding dynamic load strength Fd, and cancelling the
original standard's provisions for maximum load F1 and minimum load F2 for fatigue test;
--- Adopt all new ISO chain numbers in Table 1; add seven new chain specifications, namely.
219H, 415MH, 420MH, 520MH, 525, 525MH, 530MH; cancel 08MB-2 double-row
chain; adjust some data in the original Table 1;
--- "(0.0009df+0.08), up to 1.14mm" in ISO 10190.2008 Annex A Clause A.7, because the
diameter of motorcycle sprockets is not too large, delete "up to 1.14mm" in this Standard
adoption;
--- Partially adjust and rewrite the NOTE of Table 1;
--- Move the Annex A of the original standard to Annex B;
--- Add new Annexes A and C.
The Annexes A and C of this Standard are normative; while Annex B is informative.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee on Chain
Transmission of Standardization Administration of China.
Motorcycle Chains – Characteristics and Test Methods
1 Scope
This International Standard specifies the dimensions and mechanical properties of roller and
bush chains together with details of associated chain sprockets (see Annex A), in the range 6.35
mm to 19.05 mm pitch, for use in motorcycle applications. These chains are suitable for external
drives (e.g., rear drives).
It covers dimensions, tolerances, length measurement, preloading, minimum tensile strength
and minimum dynamic strength.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced document
applies.
GB/T 1243 Short-pitch Transmission Precision Roller and Bush Chains, Attachments and
Associated Chain Sprockets (GB/T 1243-2006, ISO 606.2004, IDT)
GB/T 1800.2 Geometrical product specifications (GPS) - Limits and fits - Part 2.Tables
of standard tolerance grades and limit deviations for holes and shafts (GB/T 1800.2-2009,
ISO 286-2.1988, ISO System of limits and fits – Part 2.Tables of standard tolerance grades
and limit deviations for holes and shafts, MOD)
GB/T 20736 Fatigue test method for transmission precision roller chain (GB/T 20736-
2006, ISO 15654.2004, IDT)
3 Motorcycle Chains
3.1 Nomenclature of assemblies and components
The nomenclature of chain assemblies and their component parts shall be as illustrated in
Figures 1 and 2; the figures do not define the actual form of the chain plates.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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