Motor

In a motor provided with a spindle to which an inner race of a ball bearing is fitted, the improvement wherein:

• said spindle has an outer peripheral knurled surface portion at an outer end portion thereof, said knurled surface portion having outermost surface portions and spaces defined between said outermost surface portions;
• said inner race of said ball bearing is mounted on said knurled surface portion of said spindle with inner surface portions of said inner race in contact with said outermost surface portions of said knurled surface portion;
• clearances are defined between inner surface portions of said inner race and said spaces of said knurled surface portion of said spindle;
• an adhesive is filled in said clearances and is cured, and through which said inner race of said ball bearing is fixed to said spindle of said motor;
• said spindle has an annular groove in an area adjacent to said knurled portion and remote from an outer end of said spindle;
• said inner race of said ball bearing is mounted on said spindle so as to cover said knurled portion and said annular groove of said spindle with a space defined between said groove and said inner surface of said inner race;
• and
• said adhesive is filled in said space between the inner surface of said inner race and said annular groove of said spindle, to improve fixing of said inner race to said spindle.