| 摘要 |
PROBLEM TO BE SOLVED: To provide a drilling tool that includes a shaft releasably connectable to a cutting body with a cutting edge at the front end. SOLUTION: The drilling tool including a shaft 1 has, at the front end of the shaft 1, a seat bounded by interspaced projections 4 and 5, between which a bottom is present. The projection 4 has a tapped hole for a screw 8. The screw alone guarantees the fixation of a cutting body, and has a characteristic of prestressing the cutting body when tightened. The opposite projection 5 internally has a support shoulder 15, against which the cutting body is pressed when the screw is tightened to prestress the cutting body laterally. The projections 4 and 5 are displaced laterally from each other to expose the screw beside the projection 5 without obstruction. |
