Patent ID: 7006953

Claim:
A method of using a computer to predict a life of a rolling bearing having a specification which a basic dynamic load rating C and a basic static load rating C 0 are calculable, wherein, when a dynamic equivalent load is P, a load index is p, a viscosity ratio of a lubricant is κ, a contamination degree coefficient is a c , a fatigue limit load is Pu, and a life correction coefficient is a NSK , causing the computer to calculate a correction rating life L A of the rolling bearing at a certain reliability coefficient a 1 by the following relations: L A =a 1 ·a NSK ·( C/P ) P a NSK ∝f[F (κ), {( P−Pu )/ C }·1 /a c ]; wherein a function F(κ) of the viscosity ratio κ is set as a lubrication parameter a L , and wherein the life correction coefficient a NSK is calculated on the basis of the lubrication parameter a L and a load parameter {(P−Pu)/C}·1/a c .