Abstract: An object of the present invention is to provide a motor capable of enhancing the balance correction effect and capable of keeping the balance correction effect for a long term. In a rotary unit, an upper portion in its axial direction of a hub cylindrical portion of a rotor hub, and an outer peripheral side of a radial extension are cut, thereby correcting the rotational balance of the rotary unit. Further, a circumferential wall is provided on the rotor hub, and a notch is provided in a portion of an outer peripheral edge of a mounting plate. By virtue of such configuration, after the motor is assembled, or after a color wheel is mounted on the motor, a first balance correcting member and a second balance correcting member are respectively fixed to lower surfaces of the circumferential wall and of the rotor magnet in the axial direction, thereby correcting the rotational balance.

Abstract: An axial gap between an annular projection of a rotor hub of a rotary unit and a sliding seal is set to be smaller than an axial gap between an axially upper face of a shaft and a cover of the rotor hub and an axially gap between an axially lower end face of a sleeve and an axially upper face of a radially-extending part of a bush. Thus, only the annular projection and the sliding seal come into contact with each other, even if the rotary unit moves downward in the axial direction.