Patent ID: 6357923
Filing Date: 2002-03-19
Classification: F16C,G11B

Abstract:
A rolling bearing comprising:an inner race adapted to be fitted to a shaft, an outer race adapted to be fitted to a housing and a plurality of rolling elements, wherein said inner race, said outer race and a base material of said rolling elements are made of a steel having a linear thermal expansion coefficient of 10.1Ã—10âˆ’6 to 13.5Ã—10âˆ’6, each of said rolling elements comprise a hard coating film disposed on an outer surface thereof, having a thickness of 0.2 &mgr;m to 2.5 &mgr;m and being harder than the base material of said rolling elements, said coated outer surface of said rolling element is different in material from raceway surfaces of said inner and outer races, said bearing is adapted to undergo a constant-position preload in the axial direction at the assembling of the bearing with the shaft and the housing.