Shaft for fluid dynamic bearing, fluid dynamic bearing...

Details Shaft for fluid dynamic bearing, fluid dynamic bearing... Shaft for fluid dynamic bearing, fluid dynamic bearing...

2007-06-05

2007-06-05

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S114000

Reexamination Certificate

active

10957015

ABSTRACT:
In a method of manufacturing a shaft for the fluid dynamic bearing device, the shaft is formed with a plurality of grooves arranged in and around the external circumference, the surface of the grooves and external circumference with uniform roughness, and machined marks on the surface aligned in the circumferential direction, by controlling the relative vibration of a rod-shaped blank to be machined as the shaft for a fluid dynamic bearing and a grinding wheel (a machining tool) to grind the external circumference of the blank.

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