the invention relates to an electromotor comprising a housing which consists of a ferromagnetic material and a rotationally driven shaft which is located in said housing . said housing comprises at least one bearing shield , with a bearing for the shaft . the bearing has sensor means for determining the state of rotation of the shaft . according to the invention , the bearing is accommodated in a screening bushing which is located in a bearing receiving opening of the bearing shield and which consists of a non - ferromagnetic material . a cover bushing consisting of ferromagnetic material which is connected to the bearing shield and which surrounds the shaft is provided , and surrounds the bearing and the screening bushing on the inside of the housing .