| 摘要 |
A drill bit guiding device is used to guide axial movement of a drill bit when forming holes in a workpiece and includes an end block, a pair of guide shafts, a plurality of guide blocks and a positioning block. Each of the guide shafts is mounted removably on the end block and the positioning block in such a manner that the guide shafts are parallel to one another and extend between the end and positioning blocks. One of the guide shafts is formed with a graduated line that is marked off in units of length. The guide blocks are mounted slidably on the guide shafts and are parallel to the end block. Each of the guide blocks is formed with a single vertically extending hole in a direction that is transverse to axes of the guide shafts. The vertically extending hole receives a corresponding tubular guide sleeve therein. The guide sleeve permits extension of the drill bit thereinto. The guide blocks are locked releasably at desired positions on the guide shafts. In use, the drill bit guiding device is secured on the workpiece, and the guide blocks are positioned on the guide shafts so that the vertically extending holes are aligned with intended locations of the holes to be formed in the workpiece. |
