Method for connecting at least two rotor elements (20, 22, 24, 26) of at least one rotor of a turbomachine, comprising at least the following steps: - detecting, by means of a measuring device, a concentricity of at least one radially outer lateral surface of the rotor elements (20, 22, 24, 26) at at least two mutually axially spaced points; - determining a distance and an angular position of a center of mass with respect to an axis of rotation of the relevant rotor element (20, 22, 24, 26) on the basis of the relevant detected concentricity; - determining, by means of an evaluation device, a relevant distance of an overall center of mass of the rotor made up of the rotor elements (20, 22, 24, 26) from its overall axis of rotation when there are different relative mounting orientations of the rotor elements (20, 22, 24, 26) with respect to one another on the basis of the previously determined centers of mass of the respective rotor elements (20, 24, 26, 28); - determining those of said different relative mounting orientations of the rotor elements (20, 24, 26, 28) with respect to one another for which the distance of the overall center of mass of the rotor from its overall axis of rotation is minimized; - interconnecting the rotor elements (20, 22, 24, 26) in the mounting orientation for which the previously determined distance of the overall center of mass of the rotor to be manufactured from its overall axis of rotation is minimized; characterized in that - the concentricity of the radially outer lateral surface of the rotor elements (20, 22, 24, 26) is detected optically by means of at least one optical sensor element of the measuring device, - the data detected by the measuring device are linked by means of the evaluation device to a three-dimensional model, in particular a CAD model, of the respective rotor elements (20, 22, 24, 26) and - the measuring device detects the data from a large number of functionally identical rotor elements (20, 22, 24, 26) and, by means of the evaluation device, the rotor element (20, 22, 24, 26) of said large number of functionally identical rotor elements (20, 22, 24, 26) for which, when selected, the distance of the overall center of mass of the rotor to be manufactured from its overall axis of rotation is minimized is selected for connection to at least one further rotor element (20, 22, 24, 26). - detecting, by means of a measuring device, a concentricity of at least one radially outer lateral surface of the rotor elements (20, 22, 24, 26) at at least two mutually axially spaced points; - determining a distance and an angular position of a center of mass with respect to an axis of rotation of the relevant rotor element (20, 22, 24, 26) on the basis of the relevant detected concentricity; - determining, by means of an evaluation device, a relevant distance of an overall center of mass of the rotor made up of the rotor elements (20, 22, 24, 26) from its overall axis of rotation when there are different relative mounting orientations of the rotor elements (20, 22, 24, 26) with respect to one another on the basis of the previously determined centers of mass of the respective rotor elements (20, 24, 26, 28); - determining those of said different relative mounting orientations of the rotor elements (20, 24, 26, 28) with respect to one another for which the distance of the overall center of mass of the rotor from its overall axis of rotation is minimized; - interconnecting the rotor elements (20, 22, 24, 26) in the mounting orientation for which the previously determined distance of the overall center of mass of the rotor to be manufactured from its overall axis of rotation is minimized; characterized in that - the concentricity of the radially outer lateral surface of the rotor elements (20, 22, 24, 26) is detected optically by means of at least one optical sensor element of the measuring device, - the data detected by the measuring device are linked by means of the evaluation device to a three-dimensional model, in particular a CAD model, of the respective rotor elements (20, 22, 24, 26) and - the measuring device detects the data from a large number of functionally identical rotor elements (20, 22, 24, 26) and, by means of the evaluation device, the rotor element (20, 22, 24, 26) of said large number of functionally identical rotor elements (20, 22, 24, 26) for which, when selected, the distance of the overall center of mass of the rotor to be manufactured from its overall axis of rotation is minimized is selected for connection to at least one further rotor element (20, 22, 24, 26).