The invention relates to a device and a method for forming, in which at least one spindle is driven in a rotating manner by means of a rotary drive, a workpiece is received on the spindle by means of a clamping means and clamped on the spindle and at least one forming roller is fed axially and/or radially relative to the workpiece in order to carry out a spinning or flow-forming process. In accordance with the invention provision is made for the spindle and the clamping means to be combined to a changing unit which is adjustable transversely to the axis of rotation, wherein the changing unit is adjusted between a forming position and a set-up position.