| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball bearing and a retainer for the ball bearing of low cost, high general-purpose properties, and excellent high speed rotation properties by improving the retainer. SOLUTION: The retainer 5 comprises a synthetic resin retainer main body 21, and a plurality of ceramic rings 22 integrated with the main body 21 by insertion forming and forming each pocket 6. COPYRIGHT: (C)2008,JPO&INPIT
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