| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing for a dental hand piece reduced in cost and improved in bearing rotation capacity at high-speed rotation. <P>SOLUTION: A retainer 59 is formed of heat-resistant resin composition. A base resin of the resin composition is polyphenylene sulfide containing glass fiber and/or carbon fiber, or polyether ether ketone containing glass fiber and/or carbon fiber. Further, the circularity of the retainer, the roughness of a guide surface, and a guide clearance are controlled. <P>COPYRIGHT: (C)2009,JPO&INPIT |
