GREASE COMPOSITION AND ROLLING SHAFT BEARING

摘要

PROBLEM TO BE SOLVED: To suppress generation of fretting abrasion while maintaining a shaft bearing life.SOLUTION: There are provided a grease composition containing a base oil by mixing mineral oil and synthetic oil with a mass ratio of mineral oil:synthetic oil=0:100 to 20:80 and having kinetic viscosity at 40°C of 70 to 150 mm/s and a thickener, and having thickener projected area of 10% or more and Anderon value 3 seconds after rolling initiation when encapsulated in a deep groove ball bearing 6203 with 0.7 g and loading 29.4 N of thrust load of 5 ANDERON or more and a rolling shaft bearing encapsulating the grease composition.