GB/T 14212-2010Motorcycle chains - Characteristics and test methods (English PDF)

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

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.

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