Patent ID: 6547443
Filing Date: 2003-04-15
Classification: F16C

Abstract:
A tapered roller bearing comprising an inner ring having a raceway on its outer peripheral surface, an outer ring having a raceway on its inner peripheral surface, a large flange surface and a small flange surface, tapered rollers rollably mounted between the raceway of said inner ring and the raceway of said outer ring and having a large end face at one end thereof and a small end face at the other end thereof, and a retainer for retaining said tapered rollers at regular spacings, wherein the average roughness R[=(Rr2+Rb2)Â½] of the roughness Rr of the large end faces of said tapered rollers and the roughness Rb of the large flange surface of said inner ring is 0.14 &mgr;m Ra or less, wherein the radius of curvature R of the large end faces of said tapered rollers is 75 to 85% of the roller reference radius, and the central angle of the contact positions between said tapered rollers and the large flange surface of said inner ring is set at {fraction (1/15)} to {fraction (1/10)} of the roller angle, wherein the center of the contact surface between said tapered rollers and said raceways is offset toward the large end faces of said tapered rollers from the center of the rolling surfaces of said tapered rollers by an amount which is 10% or less of the effective length of said tapered rollers.