(57) The invention concerns a fine metal wire winding system, in particular for continuous
electric welding wires; the system comprises a spool (3) having a central core (4)
for winding up the wire (12), and lateral flanges (5), said core (4) consisting of
angularly-spaced portions of cylindrical surfaces (4a). A chuck is also provided,
having wire-supporting members (11) arranged concentrically and insertable between
said surface portions (4a) of the core (4) so as to complete the cylindrical surface
of the core (4) of the spool for winding the wire; the wire-supporting members (11)
are provided, on the outer side (11 a), or wire-supporting side, with transversal
grooves or scorings (13) with a helical flow, defining paths for winding the wire.
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