An open-end spinning device (1) with a spinning rotor (2) whose shaft end (11) is supported by an aerostatic axial bearing (10) with an air gap (18) located between a bearing plate (17) of the axial bearing (10) and the shaft end (11). The aerostatic axial bearing (10) comprises a bearing plate (17) and a throttle device (19) made from a porous graphite material placed before the bearing plate (17). The throttle device (19) is an stamped pressed, tablet-shaped molding with largely homogenous porosity. In a process for manufacturing an aerostatic axial bearing (10) for a spinning rotor (2) of an open-end spinning device (1), a throttle device (19) made from a porous graphite material is placed before the axial bearing (10). The throttle device (19) is stamped pressed in a press tool as a tablet-shaped molding.