Abstract: A bearing arrangement in an actuating motor of an electrical camshaft adjuster, including: a first, bowl-shaped housing part made of metal; a second housing part made of plastic, closing off the first housing part; a first roller bearing which is held in the first housing part; a second roller bearing which is inserted into the second housing part; and a shaft mounted by means of the first and second roller bearings. The first roller bearings is designed as a fixed bearing. A contact surface which transmits force, and which is smaller than the inner running surface of an inner ring of the first roller bearing, is formed between the shaft and the inner ring. The first roller bearing is designed as an open bearing which is lubricated by an operating medium. The second roller bearing is designed as a sealed bearing with a lifetime supply of grease.