| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball bearing made by press-molding, for exerting a thrust bearing function with respect to both of an axially inward force and an axially outward force, and preventing outflow of lubricant when used for the rotation of an inner race. SOLUTION: The inner race 1 includes; an inner race cylinder part 11 having an outer circumference in which an inner race raceway track 11a is formed; and an inner race flange part 12. An outer race 2 includes: an outer race cylinder part 13 formed concentrically with the inner race cylinder part 11, and having an inner circumference in which an outer race raceway track groove 13a is formed; and an outer race flange part 14 extending from a left end of the outer race cylinder part 13 to an outer diameter direction. A seal 6 between flanges is constituted of a cylinder part 18 fit to an outer diameter of the outer race 2 and a seal lip 19 brought into slide-contact with the inner race flange part 12. An annular grove 21 of a lubricant outflow prevention groove is provided in an inside face of the inner race flange part 12 to suppress flow of the lubricant to the outside. COPYRIGHT: (C)2005,JPO&NCIPI
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