Abstract: A winding spindle for mounting a plurality of yarn winding tubes, and which is formed by an inner tube and an outer tube surrounding the inner tube. The inner tube connects to a drive shaft. Between the inner tube and the outer tube, a clamping device is arranged, which comprises a plurality of clamping elements which extend through openings of the outer tube for mounting the winding tubes. The outer tube extending on the circumference of the inner tube is stayed by a plurality of support members that are arranged in an axially spaced apart relationship between the inner tube and the outer tube. To this end, the support members produce a radially acting clamping force between the inner tube and the outer tube.