| 摘要 |
A broaching machine at the front end portion of a driving shaft has a first fitting part engaged with one end portion of a broach shaft (25b), and a clamp for tightening and fixing this end portion of the broach shaft, and at the front end portion of a support shaft (4) with a second fitting part (4a) engaged with the other end portion of the branch shaft and axially movable. The second end portion of the broach shaft is rotatable with respect to a broach shaft body (25). The broaching machine has a presser piece engaged with a tightening bolt screwed to a broaching tool body, and passed as a whole through an elongated bore in a holder. The machine is turned so as to be engaged with the holder, the tightening bolt being then adjusted to fix the holder to the broaching tool body.
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