Fluiddynamisches Lager mit axialer Vorspannung

The invention relates to a fluid dynamic bearing system that comprises a bearing sleeve having a bearing bore and a shaft that is rotatably supported in the bearing bore by means of a fluid dynamic radial bearing. An annular first bearing plate connected to the shaft is provided that, together with a first end face of the bearing sleeve, forms a first fluid dynamic axial bearing, means of producing an axial counterforce to the first axial bearing being available. According to the invention, the axial counterforce is applied by means of a combination of a mechanical spring element and a second fluid dynamic axial bearing. Since the spring force of a preloaded spring does not change significantly over small distances, compensation for tolerances is made possible without the bearing system losing its axial stiffness or being subjected to too much stress.