To provide a motor, wherein the bearing efficiency of its semi- spherical bearings can be increased by increasing the acting areas of its semi- spherical bearings on its rotor bushing.

A motor, having a rotor bushing 122a which has spherical grooves 125a, 125b communicating to each other in its upper and lower portions, semi-spherical bearings 124a, 124b stored in the spherical grooves 125a, 125b and separated by predetermined clearances from the rotor bushing 122a, and a supporting shaft 123 passing through the insides of the semi-spherical bearings 124a, 124b, wherein the corners of the upper and lower end surfaces of the rotor bushing 122a and the corresponding corners of flat surfaces 130a, 130b of the semi-spherical bearings 124a, 124b are made opposite to each other. Moreover, the rotor bushing 122a and the end surface of one of the semi- spherical bearings 124a, 124b are extended more to the outside than the end surface of the other of the semi-spherical bearings 124a, 124b.