Spindle motor
A spindle motor includes a sleeve fixedly installed on a base member; a shaft rotatably supported by the sleeve; a rotor hub fixedly installed on an upper end portion of the shaft to rotate together therewith; and a thrust plate fixedly coupled to the sleeve so as to be disposed to face a lower surface of the rotor hub and having a ring shape. The thrust plate includes a channel part formed therein in order to reduce a difference in pressure between a bearing clearance on an inner side thereof and a bearing clearance on an outer side thereof. The channel part is configured of grooves formed in a lower surface of the thrust plate and an inner peripheral surface thereof.
SAMSUNG ELECTRO-MECHANICS CO., LTD.
H G H H F F F F F H
H02K G11B H02K H02K F16C F16C F16C F16C F16C H02K
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Ju Ho
Kim