A transmission for a motorized drug delivery device, the transmission comprising: - a first axis and a second axis which in a reference position are arranged in parallel with each other, - a first gear wheel having: - a first centre plane, and - an axis of rotation corresponding to the first axis, - a second gear wheel having: - a second centre plane, and - a reference axis of rotation corresponding to the second axis, characterized in that the second gear wheel has a threaded bore corresponding to the second axis, the transmission further comprising: - a non-rotationally arranged rod having an outer thread along at least a part of its length, the rod in a reference position being arranged corresponding to the second axis and in threaded engagement with the threaded bore, rotation of the second gear wheel thereby providing axial movement of the rod, wherein: - the first gear wheel and the second gear wheel in a reference position are arranged with the first centre plane and the second centre plane in a common plane and in rotational engagement with each other, - the combined second gear wheel and rod are arranged to pivot corresponding to a centre point defined by the intersection of the second axis and the second centre plane, whereby the rod, with the gear wheels in rotational engagement, can be arranged out of alignment with the first axis. - a first axis and a second axis which in a reference position are arranged in parallel with each other, - a first gear wheel having: - a first centre plane, and - an axis of rotation corresponding to the first axis, - a first centre plane, and - an axis of rotation corresponding to the first axis, - a second gear wheel having: - a second centre plane, and - a reference axis of rotation corresponding to the second axis, characterized in that the second gear wheel has a threaded bore corresponding to the second axis, the transmission further comprising: - a non-rotationally arranged rod having an outer thread along at least a part of its length, the rod in a reference position being arranged corresponding to the second axis and in threaded engagement with the threaded bore, rotation of the second gear wheel thereby providing axial movement of the rod, - a second centre plane, and - a reference axis of rotation corresponding to the second axis, characterized in that the second gear wheel has a threaded bore corresponding to the second axis, the transmission further comprising: - a non-rotationally arranged rod having an outer thread along at least a part of its length, the rod in a reference position being arranged corresponding to the second axis and in threaded engagement with the threaded bore, rotation of the second gear wheel thereby providing axial movement of the rod, - a non-rotationally arranged rod having an outer thread along at least a part of its length, the rod in a reference position being arranged corresponding to the second axis and in threaded engagement with the threaded bore, rotation of the second gear wheel thereby providing axial movement of the rod, - the first gear wheel and the second gear wheel in a reference position are arranged with the first centre plane and the second centre plane in a common plane and in rotational engagement with each other, - the combined second gear wheel and rod are arranged to pivot corresponding to a centre point defined by the intersection of the second axis and the second centre plane, whereby the rod, with the gear wheels in rotational engagement, can be arranged out of alignment with the first axis.