Method for removing fine foreign matter, and rolling bearing using the same

Abstract

Residual fine foreign matters are infallibly removed when manufacturing bearing parts. A removal process of residual fine foreign matters is taken before a high precision water-washing process in a manufacturing process of each component of a rolling bearing. Accordingly, residual fine foreign matters generated in a cutting process, a heat-treating process and a grinding process are removed, including metal powder like a metal chip and falling pieces of bearing components. In the removal process of residual fine foreign matters, ground pieces of corn-cob as a raw material are used for a grinding medium. Thus, damages to a surface of rolling bearing parts may be minimized during the removal process. Moreover, the medium is likely to accommodate to a surface of bearing parts, so that residual fine foreign matters may be effectively removed.

1 - 5 . (Cancelled)  
   
   
       6 . A method for producing a rolling bearing with an inner race and an outer race, the method comprising: 
 removing residual fine foreign matter from the roller bearing with a grinding medium having a lower hardness than that of the residual fine foreign matter; and    washing the roller bearing using a deionized water washing process, wherein the grinding medium is made from corn-cob as a raw material.    
   
   
       7 . The method for producing a rolling bearing according to  claim 6 , wherein the grinding medium has various shapes.  
   
   
       8 . The method for producing a rolling bearing according to  claim 6 , wherein a barrel finishing machine is used in the removing residual fine foreign matters.  
   
   
       9 . The method for producing a rolling bearing according to  claim 7 , wherein the grinding medium is made from corn-cob as a raw material.  
   
   
       10 . The method for producing a rolling bearing according to  claim 7 , wherein a barrel finishing machine is used in the removing residual fine foreign matters.  
   
   
       11 . The method for producing a rolling bearing according to  claim 6 , wherein a barrel finishing machine is used in the removing residual fine foreign matters.