Hydrodynamic bearing device

Details Hydrodynamic bearing device Hydrodynamic bearing device

2005-01-12

2011-10-18

Charles, Marcus (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C301S010100, C029S898000, C384S228000

Reexamination Certificate

active

08038350

ABSTRACT:
In order to prevent degradation of accuracy and decrease of strength when a hydrodynamic bearing device is assembled and to reduce a cost of the hydrodynamic bearing device, a guide face serving as a guide when a disc hub is press fitted into a shaft member is formed on the shaft member. Then, the guide face, an outer circumferential surface of the shaft member adjacent to the guide face, and a boundary portion between the guide face and the outer circumferential surface are ground simultaneously, thereby forming a blunting portion having a radius r in the boundary portion. Thus, no edge remains between the guide face and the outer circumferential surface. Therefore, press-fitting resistance when the disc hub is press fitted to an end of the shaft member can be reduced.

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