| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce edge load (excessive surface pressure) based on clearance grooves 13 and 13 provided at base end portions of collar parts 8 and 8. <P>SOLUTION: Each flank 14, 14 inclined in the increasing direction of the depth of each clearance groove 13 toward the axial outside is formed over the whole circumference in a connection part of the axial inner edge of each clearance groove 13 with the axial outer edge of an inner ring raceway 4. Consequently, since the rolling surface 9 of each cylindrical roller 7 contacts with the flanks 14 and 14 even if the relative inclination is increased, or a large load is applied, the problem is solved. <P>COPYRIGHT: (C)2008,JPO&INPIT |
