| 摘要 |
PROBLEM TO BE SOLVED: To provide a ribbon cage which decreases stirring resistance of lubricating oil and reduces rotation torque. SOLUTION: A length H2 from an axial direction first main surface of a flat part 3 to an axial direction first end surface of a fastening member is equal to or longer than 50% of a length H1 from a virtual plane parallel to the flat part to the axial direction first main surface of the flat part through respective peak points in an axial direction first side of pocket parts respectively adjoining on both sides of the flat part in a circumference direction. As a fastening recessed part is buried with the fastening member 5, the stirring resistance of the lubricating oil is decreased. COPYRIGHT: (C)2008,JPO&INPIT
|
