Abstract: In the manufacture of bundles of at least ten twisted pairs or quads of electric wires, a compact design of the first twisting stage and a servicable guiding system for guiding the pairs from the first twisting stage to the twisting closer of the second twisting stage is obtained by having at least two groups of SZ-twisting devices in the first twisting stage, the rotating twisting heads of the two stages radially staggered and the guide pulleys of the respective inner twisting head which are arranged at the transition from the first to the second twisting stage provided with several guiding grooves for the twisting units so that they can guide twisted units from both the inner and outer twisting heads.

Abstract: For fixing the reversal points of the twist direction in SZ twisted elements of electric cables and lines to be twisted, a device is provided which runs along in sections with the continuously moved material to be twisted and includes clamping tongs for gripping the twisted assembly and an associated device for joining the elements to be twisted together. The clamping tongs and the joining device are arranged between the stationary twisting tool and the following stationary torsion stopper. The device for joining the elements to be twisted together preferably comprises rotatable clamping tongs which may be arranged between two non-rotating clamping tongs.

Abstract: In the SZ twisting of conductors of electrical cables followed by extrusion of a plastic sheath in the same operation, an untwisting of the reversal points of the twist direction in the area of the cooling section of the extruder is prevented by guiding the extruded sheath immediately behind the extruder in such a manner as to be secured against torsion.