An actuator, which can be actuated along a longitudinal axis, in particular for a spring carrier, includes a stationary part, a first rotor, which can be driven so as to perform a rotary motion, a rotatable second rotor, which is supported against the stationary part in the axial direction in an axial rest position, a coupling device, by which the second rotor is coupled to the first rotor, and an output element, which is connected to the second rotor and can be moved axially by means of a rotary motion of the second rotor. The coupling device interacts with the first rotor and the second rotor in such a way that, starting from the rest position, an axial movement of the second rotor can be produced by means of a first rotary motion of the first rotor in order to release the second rotor from the stationary part and thereby bring it into a working position.