arbitrarily or equally over the periphery of the internal rotor are provided according to the embodiment shown in fig1 the bearing surfaces 4 and 7 form a seal in the peripheral direction and the end surfaces of the projections 8 extend radially outwardly forming a seal on the associated pressure chambers 5 so that pressure spaces 9 10 are formed in the peripheral direction on both sides of the projections through suitable charging of the pressure chambers 9 10 the relative angular position between the external rotor 3 and the internal rotor 6 can be changed whereby the angular relationship between the drive wheel 2 and a camshaft can be changed for adjusting the opening times of valves according to fig1 both the pressure chambers 5 and also the bearing surfaces 4 are formed with a metallic insert body 11 extending in the peripheral direction which has an approximately constant wall thickness the insert body 11 is held with a firmly bonded material fit in a carrier body 12 which is formed in the embodiment shown in fig1 integrated with the drive wheel 2 or is formed as a separate component which can be connected rigidly to the drive wheel 2 fig2 shows a camshaft adjuster 1 u2032 in longitudinal section in this camshaft adjuster the drive wheel 2 u2032 is formed integrally with inwardly projecting axial approximately centrally arranged brackets 13 which extend in the direction of a longitudinal axis x x of the camshaft adjuster 1 u2032 by one third up to one fourth of the width of the running teeth of the drive wheel 2 u2032 and which are distributed arbitrarily or equally over.