| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct acting ball bearing easy to work and capable of easily performing non-magnetism. SOLUTION: This direct acting ball bearing is fixed by making round bars 5-8, 15-18 constituting a raceway track for which high hardness is required of ceramic and burying these ceramic round bars 5-8, 15-18 in an aluminium made main body 1 and an aluminium made block 2. Consequently, it is possible to constitue a ceramic made raceway track without cutting work to a ceramic made member and is possible to incorporate it in electronic equipment (for example, an X-Y table of an electronic microscope and a semiconductor manufacturing device) for which its non-magnetism is required.
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