Fiddle drill
The fiddle bit is a historical tool for drilling . He has been since the 3rd millennium BC. And was used until the middle of the 19th century. The oldest representation of a fiddle drill comes from around 2650 BC. And is in the burial chamber of Ti in Egypt.
The first drill bits of this type consisted of a bow-shaped piece of wood, the ends of which are connected with a string. A shaft is clamped into the tendon so that it rotates as the bow moves back and forth. A tip made of stone, copper or bronze is anchored to the head of the shaft and serves as a drilling tool. The shaft itself is relatively heavy or weighed down with additional round weights, on the one hand to ensure the feed and on the other hand to achieve smoother running due to the larger mass.
literature
- Fritz Spannagel : Das Drechslerwerk , Verlag Vincentz Network GmbH & Co KG, 2001, ISBN 9783878703808 [1]
Web links
Individual evidence
- ↑ Roller drill with fiddled bow drive. Deutsches Museum, accessed on June 29, 2016 .
- ^ Josef Nagler: Leaves for the history of technology . tape 22 , 1960, pp. 11 ( limited preview in Google Book Search [accessed June 29, 2016]).