| 摘要 |
A method for manufacturing a hydro dynamic bearing device is provided. This method is capable of sufficiently increasing a circumferential speed at the time of grinding an axial member which is a structural component of the hydro dynamic bearing device, and also capable of preventing the generation of centrifugal whirling to improve the grinding efficiency and working efficiency while improving the quality of the product. The axial member as one of structural component of the hydro dynamic bearing device is supported at both ends thereof with a pair of plate members in a face-contact manner, while rotating the axial member around its axial center. The outer peripheral surface of the axial part of the axial member is ground on a grindstone while supporting the outer peripheral surface of the axial part with a supporting member. Also, the plate member contacting with the flange part of the axial member in a face-contact manner has at least a roll-off part formed in a predetermined area of the rotational center of the contact surface thereof. Furthermore, the contact part of the plate member to the flange part is elastically supported by a elastic member. |
