Abstract: A rotary support is mounted on the frame of a machine tool for rotation about an axis, and a plurality of carriers is distributed along a major surface of the rotary support and connected thereto to share its rotation about the axis. Each of the carriers has a carrier axis, and the rotary support can be indexed between a plurality of positions in each of which one of the carrier axes extends parallel to a horizontal plane and other carrier axis extends normal thereto. The carrier axes may intersect the axis of rotation of the rotary support, or they may be offset therefrom so as to generate a hyperboloid during the rotation of the rotary support. The rotary support may be used for moving workpieces toward a tool and a workpiece-transporting arrangement may be associated with the rotary support for supplying workpieces thereto and removing finished workpieces therefrom.