Angular ball bearing and rolling bearing

Abstract

A rolling bearing is proposed in which even though a sealed type, no lowering of strength of the bearing rings or lowering of the front width will not occur for the convenience of mounting of a seal, and design of dimensions equivalent to a non-sealed type bearing and practicability can be achieved, and has fretting resistance. Rolling elements 3 are disposed between an inner ring 1 and an outer ring 2 with seals 9 and 10 provided. The seal 9 arranged on a counterbore 8 of the outer ring 2 is fitted in a pressed state on a peripheral surface portion of a cylindrical surface 11 forming the counterbore 8. By pressing, the seal 9 is mounted without forming a slot. The other seal 10 is fitted in a slot 12. The inner ring and the outer ring, or rolling elements of a bearing comprising the outer ring, inner ring, rolling elements and a retainer are subjected to carbonitriding and a grease using a urea compound as a thickening agent is sealed in the bearing.

1 - 6 . (canceled)  
   
   
       7 . A rolling bearing comprising an outer ring, an inner ring, rolling elements and a retainer, wherein said inner ring and said outer ring, or said rolling elements are subjected to carbonitriding and a grease using a urea compound as a thickening agent is sealed in said bearing.  
   
   
       8 . A rolling bearing as claimed in  claim 7  wherein said bearing is an angular ball bearing.  
   
   
       9 . A rolling bearing as claimed in  claim 7  wherein said bearing is a sealed type bearing.  
   
   
       10 . A rolling bearing as claimed in  claim 7  which is used for a support portion for a ball screw.  
   
   
       11 . A rolling bearing as claimed in  claim 10  wherein said support portion for a ball screw is used for a machine tool.  
   
   
       12 . A rolling bearing as claimed in  claim 8  wherein said bearing is a sealed type bearing.  
   
   
       13 . A rolling bearing as claimed in  claim 8  which is used for a support portion for a ball screw.  
   
   
       14 . A rolling bearing as claimed in  claim 9  which is used for a support portion for a ball screw.