| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device capable of corresponding to high speed rotation though grease lubrication is used. SOLUTION: Grease pressed out by rotation of a ball 5 at operating time is recovered by a grease reservoir 7, and the recovered grease is transmitted in external peripheral surfaces 3a, 3a' of inner ring bushes 3, 3' by utilizing centrifugal force, and is supplied to the ball 5 to be used for lubrication, so that stable lubrication can be performed over a long period.
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