Fixing of a bearing axial disc in a turbo engine with magnetic bearings by means of a shrink disc connection

The machine (100) has a shaft (101) mounted relative to a housing and rotated around a rotational axis (106), where radial direction (105) runs vertical to the rotational axis. The shaft protrudes through an opening and an element (102) i.e. bearing disk. An inner surface of a ring element (122) is arranged adjacent to an outer surface of another ring element (121). The outer surface conically runs from one axial end of the outer surface to another axially opposite axial end, and the inner surface conically tapers to the outer surface in a complementary manner. An independent claim is also included for a method for generating a press connection between a ring element and a shaft of a fluid-flow machine.