| 摘要 |
<p>The invention concerns a device for piercing lockwire holes on nuts (1) and screw heads hexagonal in shape, comprising a bush-bearing part (3) having at least a slope (20) at 60° relative to the horizontal against which is urged to press a surface (a) of the nut (1) to be pierced, a drill bushing (2) including on its shank a slope at 60° mounted in the vertical axis of symmetry (Z) of the slope (20) of the bush-bearing part (3) and serving as guide to a sensitive perforating machine drill (6), a lower support (4) receiving a surface (c) of the nut (1), and, co-operating with said elements (2, 3, 4) a flange (5) comprising a notch at 120° matching the surfaces (d, e) of the nut to be pierced. The position of the lockwire hole relative to the nut vertical axis of symmetry is adjusted by varying the height of the lower support (4).</p> |
