embodiment versions of the flexible drive shaft 6 the different embodiment versions of a drive shaft 6 are hereby respectively provided with spaced shaft sections with flock fibers 60 60 a and 60 b which locally enlarge the outer diameter d0 of the drive shaft 6 to an outer diameter d2 the individual flock sections 60 60 a and 60 b which are spaced from each other along the shaft axis w of the flexible drive shaft 6 represent themselves respectively as local thickenings of the drive shaft 6 and give the drive shaft 6 in the side view an undulated outer contour it has been found that by the provision of individual spaced sections with flock fibers 60 60 a and 60 b at which an outer diameter of the drive shaft 6 is specifically enlarged operating noise and vibrations by the relatively fast rotating drive shaft 6 during operation are avoided over its life span or are at least considerably reduced the sections with flock fibers 60 60 a and 60 b at which a local enlargement of the outer diameter of the flexible drive shaft 6 is achieved can thereby be spaced to each other by sections without flocking in fig2 a to 2d are shown flexible drive shafts 6 at which are respectively provided shaft sections 61 between the mentioned sections 60 60 a and 60 b which are also provided with flock fibers but which do not project radially as much as the sections 60 60 a or 60 b adjacent thereto the sections.