CYLINDRICAL COMPOSITE MEMBER FOR HYDROSTATIC GAS BEARING, PROCESS OF MANUFACTURE OF CYLINDRICAL COMPOSITE MEMBER AND HYDROSTATIC GAS BEARING WITH CYLINDRICAL COMPOSITE MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a cylindrical composite member not producing any poor connection even at an inner circumferential surface of a small-diameter back metal and capable of eliminating possibility of leakage of compression gas, a process of manufacture of this cylindrical composite member and a hydrostatic gas bearing including this cylindrical composite member.SOLUTION: A cylindrical composite member 1 for a hydrostatic gas bearing comprises: a cylindrical copper pipe 2; a cylindrical porous metallic sintered body 6 integrally diffused and connected to an inner circumferential surface 4 of the copper pipe 2 at a cylindrical outer circumferential surface 3, having a cylindrical inner circumferential surface 5, and containing copper; and annular grooves 8 extending in a radial direction from an outer peripheral surface 7 of the copper pipe 2 to a part of the porous metallic sintered member 6 and formed at the copper pipe 2 and the porous metal sintered body 6.SELECTED DRAWING: Figure 1