BUSH, MEASURING INSTRUMENT, MANUFACTURING METHOD OF MEASURING INSTRUMENT, AND CLEANING METHOD OF MEASURING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide a bush capable of precisely supporting a spindle and improving the manufacturing efficiency. SOLUTION: The bush is adapted to be interposed between a cylindrical stem 3 and a spindle provided to be protrudable and retreatable within the stem to support the spindle so as to be slidable in the protruding and retreating direction A of the spindle. A V-groove 71 as a communicating passage in which the air nipped by the stem 3 and the push 7 can reciprocate from one side of the protruding and retreating direction A of the spindle 4 to the other side thereof is provided on the circumferential surface of the bush. COPYRIGHT: (C)2005,JPO&NCIPI