| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing for a robot arm which has excellent productivity, further, is lightweight and has long service life. Ž<P>SOLUTION: The bearing for a robot arm comprises: an inner member having an orbital face at the outer circumferential face; an outer member having an orbital face confronted with the orbital face of the inner member and arranged at the outer part of the inner member; and a plurality of rolling elements arranged between the orbital face of the inner member and the orbital face of the outer member in a freely rollable manner, and at least either the inner member or the outer member is composed of an alloy steel having a specified composition. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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