Summary: After superficial inductive hardening the section of the bearing race undergoes a geometric distortion of perpendicularity. This distortion is the result of induced forces in the quenching layer by the martensitic transformation and those appearing in the rest of the section. When heating, we recognize that an angular distortion translates into a lighter spacing of the flat face (horizontal) by providing the cylindrical face (vertical). After cooling this spacing falls but persists with small amplitude. The question is how to avoid the distortion? The answer can be satisfactory only after knowledge of heating parameters is made in such a way that it remains within the requested tolerance. If hardening is done and a surpassing of tolerance is involved, we propose to make a further hardening in another region of the piece to create a counter distortion.