Rolling-bearing and bearing unit

Abstract

A rolling bearing 10 comprises races 11, 12 having a raceway 15, 16 and rolling elements 13 having a rolling contact surface, wherein at least the raceway 15, 16 of the races 11, 12 has a machined surface, and a surface layer 11 a , 12 a is formed on the machined surface by electrochemically or chemically dissolving the machined surface, whereby contamination is substantially reduced.

What is claimed is:  
     
         1 . A rolling bearing comprising races having a raceway, and rolling elements having a rolling contact surface, at least the raceway of the races having a machined surface in which a surface layer is formed by electrochemically or chemically dissolving the machined surface.  
     
     
         2 . A rolling-bearing unit comprising a rotating shaft of a flywheel for attitude control of an artificial satellite and a rolling bearing provided for supporting the rotating shaft and having races formed with a raceway and rolling elements formed with a rolling contact surface, at least the raceway of the races having a machined surface in which a surface layer is formed by electrochemically or chemically dissolving the machined surface.