T-shaped Auger
This tool is an invention of Roman times and is basically a long drill bit
with a pair of wooden handles used for rotating the tool.
Augers were used to drill large and/or deep
holes in wood, for which the bow or pump drill was not very useful. They were
applied by shipbuilders, bridge builders, millwrights, wheelwrights and the
like.
The drilling action of the auger is based on the principle
of leverage: the longer the handle, the greater the potential of applied force. Some augers and reamers were huge and had to
be operated by several people. The
design changed over time, but was changed very little by the 19th
century.
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This tool is an invention of Roman times and is basically a long drill bit with a pair of wooden handles used for rotating the tool. Augers were ... augerdrillbit.blogspot.com
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