| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rolling bearing capable of preventing the lowering of lifetime thereof even in the case where the lubricants is contaminated with moisture from outside. SOLUTION: Curvature radius of a joint part 1c of a head part and a chamfering part 1b of a rolling body 1 is set at 0.2 mm or more. Synthetic roughness (σ1 <2> +σ2 <2> )<1/2> of the mean roughnessσ1 of the center line of a head part of the rolling body and the means roughnessσ2 of the center line of a flange surface Ta as a main part of a bearing ring 2 is set at 0.3μmRa or less. Dimension yc of the chamfering part 1b in the radial direction of the rolling body between the head and a rolling surface 1d of the rolling body 1 is set at a height yk or more of the flange surface Ta of the bearing ring from a raceway surface of a boundary at an escape groove Tn side of the flange surface Ta of the bearing ring. Curvature radius of a joint part Tc between the flange surface Ta and the chambering part Tb of the bearing ring is set at 0.2 mm or more.</p> |
