| 摘要 |
A tapered roller bearing according to the invention is such that when an arithmetical mean roughness as a surface roughness of a large end face of a tapered roller isσ1 and an arithmetical mean roughness as a surface roughness of a large rib surface of an inner ring isσ2,σ1 is 0.04μm or larger, and a composite roughness that is expressed by a square root of a sum of a squared value ofσ1 and a squared value ofσ2 is 0.17μm or smaller. Raceway surfaces of an outer ring and the inner ring and a rolling contact surface of the tapered roller are crowned, and a total crowning amount is set to 50μm or larger, an outer ring crowning rate is set to 40% or larger, and a roller crowning rate is set to 20% or smaller.
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