Roller bearing

Abstract

This invention relates to a fretting-resisting roller bearing of which the various characteristics are not adversely affected and which achieves a higher temperature and a higher speed as well as a longer life. In a roller bearing comprised of a plurality of rolling elements held between inner and outer races with a cage interposed therebetween, the oil film of lubricating oil of which the dynamic viscosity at 40° C. is 20 to 150 mm 2 /s is formed on the raceway surfaces of the inner and outer races, the cage and the rolling elements and grease is enclosed.

What is claimed is:  
     
         1 . A fretting resisting roller bearing comprised of a plurality of rolling elements held between inner and outer races with a cage interposed therebetween, characterized in that the oil film of lubricating oil of which the dynamic viscosity at 40° C. is 20 to 150 mm 2 /2 is formed on the raceway surfaces of the inner and outer races, the cage and the rolling elements and grease is enclosed.  
     
     
         2 . A fretting resisting roller bearing according to  claim 1 , wherein said inner and outer races are made of steel and said roller element is made of ceramics.  
     
     
         3 . A fretting resisting roller bearing according to  claim 1 , wherein said inner and outer races are made of steel and said roller element is made of super-hard alloy.