Posted by John Garner on December 23, 2012 at 09:55:14 from (71.139.180.36):
This tool looks to me to be a "ratchet drill", which was usually used in conjunction with a "old man" (aka "ratchet crow" or "drill crow") to drill large holes in heavy metal, by hand. The drills use with a ratchet drill were most often twist drills if purchased, flat (aka "spade" or "farmer") drills if homemade, and had a tapered-square shank similar to, but almost always larger than, the tapered-square shank on a carpenter's auger bit.
The drill crow is built of three pieces, a base that can be bolted or clamped to the workpiece, a round column fixed to the base, and an arm that could be slid up and down the column and rotated around the column. In use, the arm would be set so that the screw jack protruding from the ratchet drill head could force the drill into the work as the drill was rotated.
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