An axial bearing for a spinning rotor of an open-end spinning machine includes a static bearing component having axially polarized permanent magnet rings delimited on both sides by ferromagnetic pole disks arranged in a bearing housing, the static bearing component interacting with a dynamic bearing component formed by ferromagnetic webs arranged on a rotor shaft of the spinning rotor. Each pole disk includes a disk ring, a central opening, a vertical axis, and a horizontal axis. The disk ring includes an area of reduced ferromagnetic material on an inner circumference thereof at the vertical axis as compared to a remaining inner circumferential area of the disk ring.

The invention relates electric machine extending along an axis Z, and comprising (i) a rotor portion configured for rotating around the Z axis at a defined position along the Z axis, and comprising a field source having p pole pairs; (ii) a stator portion comprising at least one pair of windings comprising each an upper (30) and a lower (40) winding, comprising each a plurality of p pole pairs, the upper (30) and lower (40) winding being arranged so as to form a passive axial electrodynamic bearing. According to the invention, the connections (31-42, 32-41 or 31-41,32-42) between the upper (30) and lower (40) windings comprise terminals of the electric machine connectable to an electric power supply or to an electric load.

An axial bearing for a spinning rotor of an open-end spinning machine includes a static bearing component having axially polarized permanent magnet rings delimited on both sides by ferromagnetic pole disks arranged in a bearing housing, the static bearing component interacting with a dynamic bearing component formed by ferromagnetic webs arranged on a rotor shaft of the spinning rotor. Each pole disk includes a disk ring, a central opening, a vertical axis, and a horizontal axis. The disk ring includes an area of reduced ferromagnetic material on an inner circumference thereof at the vertical axis as compared to a remaining inner circumferential area of the disk ring.