The invention relates to an electric machine comprising a pole pot (2), a shaft (3), a roller bearing (4) having an inner ring (5), an outer ring (6) and a plurality of rolling bodies (7), said roller bearing (4) supporting the shaft (3) on the pole pot (2), and further a spring element (8) that is arranged in the axial direction (X-X) of the shaft (3) between a base of the pole pot (9) and the roller bearing (4), wherein the spring element (8) preloads the roller bearing (4) in the axial direction.