มอก. 679-2530

Scope (English)

Classifies bicycle hubs into 2 types, i.e. ordinary hubs and brake hubs. Subclassifies each type into front hubs andrear hubs. Prescribes shapes, dimensions and tolerances, number of spoke holes of the flanges in accordance with those of the rims, threads, plating. Specifies performance, general characteristics, eccentricity of ball races,axial run-out of the flange during rotation, hardness, endurability. Includes marking, labelling, sampling and criteria for conformity, testing.