Camshaft adjuster and separating sleeve for a camshaft adjuster

A camshaft adjuster comprising:

• a stator, a rotor rotatable relative to the stator around a rotation axis and having a hub for accommodating a camshaft, first supply channels and second supply channels, separated therefrom, radially penetrating the hub, and a separating sleeve, inserted into the hub with at least one end section, which forms an outer axial supply space and an inner axial supply space, separated therefrom, in the hub, the outer axial supply space being fluidically connected to the first supply channels, and the inner axial supply space being fluidically connected to the second supply channels, the separating sleeve including a cylindrical base body including an outer shell defining an outer circumferential surface of the separating sleeve and a number of axial grooves penetrating partially radially into the cylindrical base body away from the outer shell, the axial grooves at least partially forming the outer axial supply space and which are each fluidically connected to the first supply channels, and that the separating sleeve includes a number of radial apertures fluidically connecting the inner axial supply space to a second supply line, the separating sleeve including a first end received in the hub and a second end protruding outside of the hub, the outer axial supply space including an annular groove at the second end and the axial grooves extending from the annular groove to the first supply channels.