CYLINDRICAL ROLLER BEARING AND BEARING DEVICE FOR TRANSMISSION

摘要

A cylindrical roller bearing (1) is provided with an outer race (10), an inner race (20), and a plurality of cylindrical rollers (30). The outer race (10) has on the inner peripheral surface thereof an outer-race raceway surface (11) and a pair of outer-race flanges (12) provided on both axial-direction sides of the outer-race raceway (11). The inner race (20) has on the outer peripheral surface thereof an inner-race raceway (21) and an inner race flange (22) provided on one axial-direction side of the inner-race raceway (21). The cylindrical rollers (30) are arranged between the outer-race raceway (11) and the inner-race raceway (21). The radial-direction height (A) of the outer-race flanges (12) is greater than the radial-direction height (B) of the inner-race flange (22). The radial-direction gap (C) between the outer-race flanges (12) and the inner-race flange (22) is set to 2 mm or less. Consequently, the incidence of edge loading due to a thrust load is minimized and the state of lubrication inside the bearing is improved, which makes it possible to markedly reduce the size of a highly durable cylindrical roller bearing and transmission.