Device for assembling a flexible conduit element

The invention concerns a device for assembly of a flexible conduit element comprising a flexible ring-corrugated or helical-shaped bellows member and a surrounding jacket cooperating therewith and having an inner arbor penetrating through the bellows member. A device for assembly of a flexible conduit element consisting essentially of a flexible ring-corrugated or helical-shaped bellows body which is displaced over an inner arbor in order to introduce a jacket into the corrugations of the bellows body, has an the inner arbor comprising actuating elements for engagement into the corrugations of the bellows body at an inner side thereof. The inner arbor has an axial length which can be adjusted.