Camshaft adjuster

The invention relates to a camshaft adjuster having a pot-like stator (1) that can be driven by a crankshaft of an internal combustion engine; and a rotor (3) that can be rotationally fixedly connected to a camshaft of the internal combustion engine; having an outer ring (20) and an inner ring (21) arranged concentrically with respect to the outer ring (20); and a plurality of radially oriented webs (9) connecting the outer ring (20) and the inner ring (21) to each other, which subdivide the annular space formed between the outer ring (20) and the inner ring (21) into a plurality of working chambers (5), wherein the working chambers (5) are subdivided into oppositely acting pressure chambers (6, 7) by stator webs (2), which are connected to the stator (1) and project laterally into the working chambers (5) and to which hydraulic oil can be applied; and the rotor (3) is mounted by the outer ring (20) in the radial direction on a cylindrical wall (24) of the pot-like stator, wherein at least one depression (4) forming a pocket to receive hydraulic oil is provided on the radial outer side of the outer ring (20) and/or on the radial inner side of the cylindrical wall (24) of the pot-like stator (1).