This standard considers precision transmission chains, simple and multiple, with bushes, short pitch, used in mechanical power transmissions and related applications, with the relevant attachments and sprockets. It includes dimensions, tolerances, measuring loads and breaking loads. The dimensions indicated ensure the interchangeability of meshing of the chains and, in case of repairs, the interchangeability of the links.
UNI 7889-1978 history
1978UNI 7889-1978 Short pitch transmission precision bush chains, attachments and chain wheels.