FIELD: mechanical engineering. SUBSTANCE: device is provided with the second carrier ball 14 received in opening 11. The number of members, which transmit effort and are interposed between carrier balls 14, is even. Each member is made as several transmitting ball which form a toothing. For instance, pneumatic or hydraulic facility 13 is used for creating reciprocation. The facility has driving motor 24. Part 5 rotates in one or another direction depending on direction of movement of part 9. Balls 14 move in guide grooves 4. EFFECT: enhanced efficiency. 10 cl, 12 dwg
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