Patent ID: 6481898
Filing Date: 2002-11-19
Classification: F16C

Abstract:
A ball bearing comprising:a plurality of balls having a diameter disposed so as to roll between an inner ring and an outer ring, a groove of an arcuate cross section being formed in a circumferential direction of each of the inner ring and the outer ring in contact with the plurality of balls, wherein the arcuate groove of the inner ring is formed such that its radius of curvature is within a range of between 52.5% and 60.0% of the diameter of the balls, the arcuate groove of the outer ring is formed such that its radius of curvature is within a range of between 50.5% and 53.0% of the diameter of the balls, and the diameter of the balls is defined as 0.32 to 0.60 times the value for: (outer diameter of outer ringâ€”inner diameter of inner ring)/2.