A machine element has individual ring components (10, 12) fixable to third components such as axles, hubs or shafts by internal and/or external threads. One ring component (10) can be moved in an axial direction relative to another ring component (12), by clamping screws (18). The two ring components (10, 12) are independent components that delimit a separation space (22) with their adjacent mutually facing end-faces. The separation space opens on all sides to the surroundings. Only the clamping screws (18) of the adjusting device pass through the separation space (22).