| 摘要 |
PURPOSE: A drilling jig is provided to quickly and precisely drill holes in a workpiece without a marking process. CONSTITUTION: A drilling jig(10) is located at the upper or side surface of a workpiece, and includes a positioning unit(20). A through hole is formed at the center of the jig, and is perpendicular to the workpiece. A bushing(13) is inserted into the through hole, and prevents the damage of the through hole. The bushing has a guide hole(15), and a protrusion. The positioning unit includes a fixed plate(22), a main shaft(30) inserted into a vertical hole(23) formed at the fixed plate, and an arm(35) installed at one end of the main shaft.
|
