| 摘要 |
PROBLEM TO BE SOLVED: To obtain a disc drive motor, which can achieve the cost reduction and in which a cap for preventing lubricant and rustproof agent from dispersing from ball bearings can be firmly fixed. SOLUTION: A frame 20 of a rotary shaft type disc drive motor 1A is a stamping, manufactured by press working on a steel plate, etc. Therefore, the finish with the inner diameter, out-of-roundness, etc., of a bearing-retaining part 21 which have certain quality level or higher which cannot be obtained without secondary machining in the case of a casting can be obtained. The lower half portion of a lower side ball bearing 17 is made to protrude downward from the bottom part 23 of the frame 20 and a cap 55, with a side plane 550 put on the protruding portion. The cap 55 is fixed with an adhesive 59 applied to its lower end plane, the side plane of an outer ring 17A of the ball bearing 17 and the lower surface of the frame 20. |
