| 摘要 |
The insert drill (10) disclosed comprises a drill body (12) proper in which the entering hole-forming inserts (34, 36, 38, 40) are mounted in a removable and replaceable end cap (26) to facilitate restoration of the drill (10). The attachment of the end cap (26) to the drill body (12) is made by two sizable pins (54) received in aligned holes (50, 50', 52, 52') in the end cap (26) and drill body (12) and secured therein by set screws (58) engageable with holes (56) in the pins (54). |
