Patent ID: 6256885
Filing Date: 2001-07-10
Classification: F16C,Y10T

Abstract:
A method of manufacturing a hydrodynamic gas bearing, comprising the following steps:providing a raw shaft body extending along an axis in an axial direction, and having an initial outer periphery, and having an initial inner periphery bounding an interior hollow portion extending in said axial direction in at least a portion of said raw shaft body, wherein said initial inner periphery bounding said hollow portion has a non-round shape that is symmetrical with respect to a line extending perpendicularly to said axis in a cross-section plane normal to said axis;processing said raw shaft body to form thereof a processed shaft body, comprising applying pressure to said initial outer periphery of said raw shaft body around said hollow portion so as to deform said initial outer periphery, and then releasing said pressure, so that said initial outer periphery forms a final outer periphery and said initial inner periphery forms a final inner periphery respectively of said processed shaft body, wherein said final outer periphery and said final inner periphery respectively have such shapes that a first distance between said axis and said final inner periphery varies along said final inner periphery in a peripheral direction around said axis, and a second distance between said axis and said final outer periphery varies along said final outer periphery in said peripheral direction;providing a cylindrical bearing body with a hollow interior; andfitting said processed shaft body into said hollow interior of said bearing body with a radial clearance space between said bearing body and said final outer periphery of said processed shaft body.