| 摘要 |
Provided is a fluid bearing device in which run-out of another member fixed to a shaft member is suppressed. At one end of a shaft member (2), there is provided a press-fitting fixation surface (2a4) to which a hub (3) can be press-fitted and fixed. Further, between the press-fitting fixation surface (2a4) and an end surface (2d), there is provided a guide portion (10) to be used when press-fitting the hub (3) onto the press-fitting fixation surface (2a4). The guide portion (10) is provided with a cylindrical surface (11) of a smaller diameter than an inner peripheral surface (3b) of the hub (3). Further, between the press-fitting fixation surface (2a4) and the cylindrical surface (11), there is provided a first diverging surface (12) with an arcuate section gradually diverging from the cylindrical surface (11) toward the press-fitting fixation surface (2a4), and between the cylindrical surface (11) and the end surface (2d), there is provided a tapered second diverging surface (13) gradually diverging from the end surface (2d) toward the cylindrical surface (11).
|
