This machine is used for the production of “figure 8” locks which are normally used on bracelets, necklaces and earrings. Starting from a spool of wire and short cutted tube pieces, the machine is able to assemble automatically the lock, without any manual operation. The particular mounting (patented) system of the wire through small tube pieces, the wire locking and the edges TIG soldering, is optimized by a PLC process. The complete absence of any manual operation, allows to obtain always standard locks and perfect in their shape and weight, enabling a larger production quantity.