| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin cage for a rolling bearing usable for a long period of time in a high temperature region of 200°C or higher, moldable by an injection molding method using a usual split die even if having an undercut part, and excelling in productivity. SOLUTION: Thermoplastic super engineering plastic or a polymer alloy having long-term heat resistance of 200°C or higher is used as a resin component, and the radius of curvature R<SB>1</SB>of the outer surfaces of claws 12a, 12b of a crown type cage is set to 110-150% of a radius R<SB>2</SB>of a ball. A projecting amount H<SB>1</SB>of the claw parts 12a, 12b from a base body part 10 is set to 25-75% of the width H<SB>2</SB>of the cage. The occurrence of damage such as whitening and cracking in mold release is thereby eliminated even if the undercut part exists. COPYRIGHT: (C)2008,JPO&INPIT
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