| 摘要 |
PROBLEM TO BE SOLVED: To provide a shaft or a roller conveyer usable for any shaft hole by overcoming difference between shaft holes made by a manufacturer. SOLUTION: A cross section of both ends has a shape formed by cutting out a circle with parallel-straight lines, the cross section shape of both ends continues from both ends toward the mutually opposite ends to the inside of a shaft receiver at least in mounting, and both ends outside the shaft receiver in mounting have split pin holes in the direction parallel with the parallel- straight lines and in the direction vertical to the parallel-straight lines.
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