A rotor device, in particular a stepper motor rotor device, with at least one hollow body, in particular a pressure pipe of a valve, and with at least one rotor assembly group that is fixated, in particular at least partially in a rotationally fixed and translationally fixed manner, in the hollow body, including at least one rotor element, which is at least configured to convert a magnetic field change into a rotational movement of the rotor element, further including a support element, which is at least configured for a rotational support of the rotor element, and including at least one fixation element, which is at least configured for a fixation of the rotor assembly group within the hollow body, in particular within the pressure pipe, wherein



the support element is arranged in the hollow body in such a way that axial forces pulling at least towards the rotor element and/or axial forces pulling and pressing the support element along at least two opposing directions are transmittable via the support element.