| 摘要 |
This invention concerns a rolling screw with smaller advance per turn than t he pitch of the threading, characterised in that a threaded coupling is foresee n in which a screw (1) is turned inside one or more female screws inserted in a single body or sleeve (2) and where the pitch of the thread of said female screws is equal to that of the screw (1), whereas the nominal diameter is greater than that of the screw itself. |
