Patent ID: 8104968

Claim:
A rolling contact bearing assembly comprising bearing component parts including a raceway ring and a rolling element, a diametric portion of each of the rolling element and the raceway ring viewed in a direction perpendicular to a bearing longitudinal axis being a rolling surface having less than perfect circularity, the rolling surface of at least one of the bearing component parts satisfying the following relation between the number n, n being an arbitrarily chosen natural number, and the amplitude r of waviness of the rolling surface relative to perfect circularity: logarithmically transforming the order n and the amplitude of waviness to define X=Log (n) from the order n and Y=Log(r n ) from the amplitude r of n-order; and when a regression line of Y=aX+b is determined, the ratio δ/σ of the deviation δ at each X from the regression line of Y to the standard deviation σ is made smaller than 4.