Bow drill

The fiddle drill ( also violin drill or drill role called ) is a very old historic tool. This drilling has been known since the 3rd millennium BC and was to the 20th century, used in for drilling in various materials (including wood and metal for jewelry making ).

The first drill of this kind, which were found during excavations, composed of a curved wood in sheet form, which is connected with a piece of string at the ends like the bow and arrow ( ' fiddle '). At the end of a shank by which the fiddle is wound, there is a brick anchored, copper or bronze tip serving as a drilling tool. By the reciprocating movement of the arc of the bar is set into a rapid rotation. The shaft itself is weighted relatively heavy or with additional round weights to firstly ensure the feed to achieve a smoother running on the other by the greater mass.

The oldest representation of a fiddle drill is on a relief around 2500 BC in the grave chamber of Ti in Egypt.