Patent ID: 8593756

Claim:
A spindle motor for use in a disk drive apparatus to drive a disk, the disk drive apparatus including a housing defining an interior space, the spindle motor comprising: a stationary portion including a shaft arranged to extend in an axial direction; a base portion arranged to define a portion of the housing, and including a through hole in which the shaft is inserted; and a rotating portion arranged to rotate about a central axis with respect to the stationary portion; wherein the base portion includes an inner circumferential portion arranged to define the through hole, the inner circumferential portion and a lower portion of the shaft defining a fixing region therebetween; the fixing region includes a press-fitting region and an adhesion region defined on a lower side of the press-fitting region and in which a seal gap is defined between the inner circumferential portion of the base portion and the lower portion of the shaft; the seal gap has a tapered shape such that a radial width of the seal gap gradually decreases from an axially lowermost portion of the seal gap towards an axially upper portion of the seal gap; and the seal gap includes an adhesive arranged therein over an entire circumference thereof, an axially lowermost portion of the adhesive is arranged axially above an axially lowermost surface of the shaft and an axially lowermost surface of the base plate.