| 摘要 |
PROBLEM TO BE SOLVED: To provide a retainer of greatly improved durability by sufficiently forming Tufftride coating on a pocket corner radius part. SOLUTION: The corner radius part dimension of a pocket 5a of a steel retainer 5 provided between a cone 2 and a cup 3 of a bearing and retaining a plurality of rolling elements 4 in the pockets 5a is set to 20% or more and 30% or less of retainer wall thickness and is applied with Tufftride treatment. Moreover, a groove part extending in a bearing axial direction to a middle of a large annular part is formed on an inner surface of a retainer column part between the pockets. COPYRIGHT: (C)2008,JPO&INPIT |
