A detachable coupling on a rotary drive is provided with first and second coupling surfaces (14, 17) arranged opposite each other. The coupling parts can be assembled without observing a preferential position. The first coupling surface (14) has a plurality of needles (15), which are arranged in a matrix-like pattern and point away from the coupling surface (14). The second coupling surface (17) has a fabric layer (18) designed to receive the needles (15).