Patent ID: 6273230
Filing Date: 2001-08-14
Classification: F16C,F16D

Abstract:
A ball bearing comprising:an outer race;an inner race; anda ball rollably interposed between the outer and inner races,wherein each of said outer and inner races includes a groove having an arc-shaped section formed in contact surfaces thereof with respect to the ball so as to extend in the peripheral direction thereof, wherein the radius of curvature re of the groove of the outer race and the radius of curvature ri of the groove of the inner race each satisfies at least one of three equations below,1.0.ltoreq.(re+ri)/Da.ltoreq.0.9746(Da/dm).sup.-0.0304, (1)1.0.ltoreq.(re+ri)/Da.ltoreq.0.976(Da/dm).sup.-0.0255, (2)1.0.ltoreq.(re+ri) /Da.ltoreq.0.9638(Da/dm).sup.-0.0315, (3)where Da: the diameter of the ball, and dm: the mean value of the diameters of the grooves of the inner and outer races.