A support disk for a suspension for a spinning rotor (2) of an open-end spinning device features a base body (8) and a thrust ring (9) with a running surface (10) attached on an outer circumference of the base body (8), whereas the running surface (10) has a crowned outer contour in the axial section. The running surface (10) features at least two partial sections (11), between which at least one groove-shaped recess (12, 14, 16) is formed. A suspension for a spinning rotor (2) of an open-end spinning device contains support disks (3) arranged in pairs forming a wedge slit, whereas the spinning rotor (2) can be mounted with its shaft (1) in the wedge slit, and whereas at least one of the support disks (3) is formed as described above.

A support disk for a suspension for a spinning rotor (2) of an open-end spinning device features a base body (8) and a thrust ring (9) with a running surface (10) attached on an outer circumference of the base body (8), whereas the running surface (10) has a crowned outer contour in the axial section. The running surface (10) features at least two partial sections (11), between which at least one groove-shaped recess (12, 14, 16) is formed. A suspension for a spinning rotor (2) of an open-end spinning device contains support disks (3) arranged in pairs forming a wedge slit, whereas the spinning rotor (2) can be mounted with its shaft (1) in the wedge slit, and whereas at least one of the support disks (3) is formed as described above.