JP2000179559A5 - - Google Patents

Claims (4)

In a rolling bearing used with a rolling element disposed between the inner ring and the outer ring and lubricated with a lubricant, the ratio of the friction coefficient between the inner ring and the rolling element to the friction coefficient between the outer ring and the rolling element is more than 0.8. A rolling bearing characterized in that the inner ring is subjected to a surface treatment that is large and less than 1.0 and that has a small coefficient of friction with a rolling element and generates compressive residual stress. The rolling bearing according to claim 1, wherein the amount of retained austenite of the inner ring is smaller than the amount of retained austenite of the outer ring. The rolling bearing according to claim 1 or 2, wherein an oil film parameter between the inner ring and the rolling element expressed below is greater than 0.8, and an oil film parameter between the outer ring and the rolling element is less than 4.0.
Oil film parameter: Λ = h _min / (R _1rms ² + R _2rms ² ) ^1/2
h _min : Dowson-Higginson , Hamrock-Dowson The minimum oil film thickness calculated by the formula
R _1rms ： Race surface surface mean roughness of raceway
R _2rms : Rolling surface root mean square roughness of rolling element The rolling bearing according to any one of claims 1 to 3, wherein the roller bearing is a self-aligning roller bearing.