Patent ID: 8687317

Claim:
A spindle motor comprising: a stationary portion including a stator; and a rotating portion including a rotor magnet, and rotatably supported through a lubricating oil; wherein the stationary portion includes: a shaft centered on a central axis extending in a vertical direction; and an upper annular member arranged on an axially upper portion of the shaft, and including a hole through which the shaft is inserted; the rotating portion includes a sleeve including a central hole through which the shaft is inserted; the shaft includes a substantially annular upper shaft recessed portion defined in an outside surface of the shaft, arranged opposite to an inside surface of the hole of the upper annular member, and recessed radially inward from the outside surface; the lubricating oil is arranged to cover an inside surface of the central hole, the outside surface of the shaft, and a circumference of the upper annular member; and an adhesive is arranged in a gap defined between the upper shaft recessed portion and the inside surface of the hole of the upper annular member.