A continuously variable transmission for transmitting torque with at least one input shaft introducing torque into the continuously variable transmission, with at least one further shaft, to which the torque is to be transmitted, and a force-transmitting endless element, which has a non-positive connection to the at least one input shaft and the at least one further shaft. The deep-rolling roller head has a prismatic, flat, approximately rectangular housing on whose one front side, which faces the bearing journals to be deep-rolled of the crankshaft, two roller cages are provided. In one embodiment, the grooves are formed in the surface substrate during the injection molding process of the substrate. The methods and devices further include selecting amounts of each dopant element of the plurality of dopant elements wherein amounts and atomic radii of each of the plurality of dopant elements complement each other to reduce a host matrix lattice strain. The female housing includes female threads inwardly extending from an interior surface. Also, local phase change such as melting and solidification is not caused.