Abstract
New life theory for rolling bearings is propounded by a linkage between the rating life data converted into the same size with bearing races in relation to the characteristic data of material carried out by alternating torsion probabilistic stress-life (P-S-N) test for hourglass shape specimens (Weibull slope ms_2=3/2, D_eo=φ8 mm) and the theoretically equivalent rating life data for bearing races (m= 10/9 for point contact bearings and m =21120 for line contact bearings). The 90% load rating formulas for races and a whole bearing are developed with a linkage factorβ, and then a newly introduced 100% load rating formulas are postulated with a linkage factor βby using the minimum life data for the life distribution data of ball bearings #6206. Consequently,β = 2A,β' = 2.16 and a reduction factor of rating loadλ=β'/β = 0.9 can be evaluated.
