By tongue we mean an organ of a fixed shape intended to be keyed into the hollows of shafts and hubs to transmit motion. The motion is transmitted only by the connection of the lateral walls having established couplings; there is no inclination on any wall. By key we mean an organ of a fixed shape intended to be keyed into the hollows of shafts and hubs to transmit motion. The motion is transmitted only by the forced connection of the upper and lower walls on the upper surface of the keys and on that of the relevant hub groove, an inclination of 1:100 is established. Table showing representation, name and reference to UNI standards of the tabs (UNI 6604, UNI 6606, UNI 7510). Overview representation, name and reference to UNI standards of the keys (UNI 6607, UNI 6608, UNI 7511 to UNI 7515).
UNI 6603-1976 history
1976UNI 6603-1976 Parallel and taper keys. Definitions and summary of the standard types.