an apparatus for the deep rolling of recesses and radii of crankshafts . the deep rolling is accomplished with the aid of deep - rolling rollers which , during revolution of the crankshaft , penetrate into the recesses or radii of the crankshaft under application of a deep - rolling force and at an angle of approximately 35 ° and bring about a deformation in the crankshaft itself . according to the invention , the depth of penetration of the deep - rolling rollers in the crankshaft is measured in the radial direction and the magnitude of the deep - rolling force is regulated as a function of the measured penetration depth in such a fashion that in the course of at least one revolution of the crankshaft a plastic deformation corresponding to a predefined rolling depth is obtained at least at one of the two recesses or radii of a relevant journal bearing after the deep rolling .