Work e.g. drilling, precision improving device for e.g. industry field, has bracket plate with bracket face perfectly placed against reference face of piece to be machined by pushing spring to trigger contactor and switch on indicator
摘要
<p>The device has a bracket plate (4) equipped with a contactor (6) and a luminous indicator (9) and presenting an axis adjusted identical to an axis of a hand-held drilling machine. The plate has a bracket face (F) perfectly placed against a reference face of a piece to be machined by pushing a spring (22) for triggering the contactor and switching on the indicator such that the indicator indicates correct positioning of the drilling machine.</p>
