Patent ID: 8166496

Claim:
A spindle motor, comprising: a bearing housing having a bearing inserted therein; a shaft rotatably supported by the bearing; a stator disposed around the bearing housing; a rotor facing the stator, the rotor being configured to rotate with the shaft; and a turntable coupled to a portion of the shaft exposed from the bearing housing, the turntable including: a table having an upper surface and a lower surface, wherein a disk is mountable on the upper surface of the table; a first inner side wall, a first upper wall, and a first outer side wall forming a first annular hollow portion at a lower surface of the table; and a second upper wall and a second side wall including a second inner side wall and a second outer side wall forming a second annular hollow portion at a lower surface of the table, wherein the second annular hollow portion is closer to the shaft than the first annular hollow portion; a ball inserted into the first annular hollow portion; and a ball cover covering an opening of the first annular hollow portion at the lower surface of the table, wherein the first outer side wall widens as it travels downward toward the lower surface of the table.