It is known that for open-end spinning, the cleaned and pre-drawn fibres which are for example in the form of "sliver" must be combed, i.e. they must be separated so that adjacent fibres do not cling together. The known combing rollers developed for this purpose generally comprise a combing means, i.e. a pinned ring or saw-tooth set which is secured to a core and usually pressed on to the same. These known combing rollers, however, have the disadvantage that, when a certain state of abrasion is reached, they must be removed from operation completely and replaced by new rollers. Also, the roller cores, which only undergo minimal wear and tear during the combing process, cannot be used again with the known structures.
A further disadvantage of the known combing rollers is that their combing means cannot be removed and replaced the other way round, i.e., are not reversible, and the working angle of the pins cannot therefore be changed.
These disadvantages are overcome with the present invention in that, for the purpose of replacement, the ring is located loosely on the ring core with one cylindrical take-up surface and is held in this position by a cover which is detachably fixed to the ring core.