| 摘要 |
A gas bearing spindle (1) includes a rotation shaft (10), a sleeve (30), and a housing (20) The sleeve (30) includes a bearing portion (31) formed of a nonmetallic sintered body; and a retaining ring (32) formed of a metal. Further, the retaining ring (32) and the bearing portion (31) are in contact with each other at a first fit surface (81) that is a boundary surface between the outer circumferential surface of the bearing portion (31) and the inner circumferential surface of the retaining ring (32), as well as at a second fit surface (82) that is a boundary surface between the outer circumferential surface of the bearing portion (31) and the inner circumferential surface of the retaining ring (32), is distant further away from the sleeve through hole (33) relative to the first fit surface (81), and is formed adjacent to a center of the sleeve through hole (33) in a direction in which the sleeve through hole (33) extends, when viewed from the first fit surface (81). |
