Patent ID: 7484895
Filing Date: 2009-02-03
Classification: F16C,F16H

Abstract:
1. A tapered roller bearing comprising: an outer ring; an inner ring; a plurality of tapered rollers interposed between the outer and inner rings; and a cage for the tapered rollers, wherein, where D represents a larger end diameter of the tapered roller and L represents a roller length thereof, the roller length L is 18 mm or smaller, and D/L is in the range of 0.55 to 0.9, and wherein respective raceway surfaces of the outer ring and the inner ring and rolling contact surfaces of the tapered rollers are crowned such that: a total crowning amount, which is a sum of outer ring crowning amount, inner ring crowning amount and two times of roller crowning amount, is 50 μm 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.