Machining unit for a machine tool and such a machine tool

A machining unit for use on a machining tool, the machining unit comprising:

• a head carrier that is attachable to the machine tool, the head carrier having a head carrier housing;
• a swivel head that is provided to swivel relative to the head carrier about a swivel head rotation axis, the swivel head having a swivel head housing;
• a spindle head that is attached to the swivel head, the spindle head having a working spindle;
• and
• a cable run that extends inside the head carrier housing to the swivel head, the cable run including a structure having a plurality of structural members that are arranged in a chain succession, adjacent structural members of the plurality of structural members being movably connected together so as to rotate and swivel relative to one another,
• wherein each structural member of the plurality of structural members has a central piece and a sheathing spaced apart from the central piece, the central piece being connected to the sheathing via one or more rib connection elements, which extend from the central piece to the sheathing.