Abstract: The present invention relates to an apparatus and a method for bending hard-drawn copper conductor bars for rotor windings of turbo-generators and engines. This method makes it possible to prevent heating up and accompanying transformation of hard-drawn copper into soft copper, which leads to a reduction in the stability with respect to centrifugal forces and thermal expansions. The apparatus and the method permit automatic, step-by-step bending of hard-drawn copper conductor bars, with sensing of the bending radius achieved and correction in the direction of the desired bending radius. For this purpose, initially a hard-drawn copper conductor bar is bent by means of a pair of bending cylinders to a previously set bending radius, the bending radius actually achieved is measured and a correction of the bending radius used in the next step takes place, in order to achieve an approximation to the desired bending radius.