| 摘要 |
<p>A tapered roller bearing (1) includes an outer ring (20), an inner ring (10) including a large rib surface (13) formed into a concavely curved surfaced recessed in an axial direction, and a plurality of tapered rollers (30). R1/R2 is in the range of 0.07 to 0.8 where R1 represents radius of curvature of a large end face (33) of the tapered roller (30) and R2 represents a radius of curvature of the concavely curved surface. An arithmetical mean roughness the large end face (33) is in the range of 0.01 to 0.03µm. A total crowning amount is 50µm or larger, an outer ring crowning rate, which is a rate of the outer ring crowning amount on the total crowning amount, is 40% or larger, and a roller crowning rate, which is a rate of two times of the roller crowning amount on the total crowning amount is 20% or smaller.</p> |
