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- Jul 26, 2011
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I have tried 2 other times to post this. Maybe too many pictures? Don't know. If this works,I'll post more pictures. These are pictures I took some time ago,and I think their files are too large. I learned better later on.
O.K.,took a while. This drill is about 14" long. It is not a copy of any existing 19th.C. drill,but there are a few of this nature that were apparently made as one-off projects by the workmen themselves. Too expensive a drill to market,I suppose.
The handles are rosewood. The 1/2" diameter drill rod bar going down the center line of the drill is hardened,and has a 60º tip on it which serves as a thrust bearing for the small bevel gear.
The tool steel chuck is a simple,early style,which accepts 1/4" shank spade bits of different diameters on their cutting ends. There are "tommy bar" holes on both handles,minimizing the number of tools needed to take the drill apart,and using those same tightening holes as extra artistic touches(compared to hex nuts.)
The moldings turned on the large gear were turned with freehand tools in the metal lathe,just as wood is turned. In early days,metal was often turned freehand,before we had more advanced lathes with carriages and cross feeds.
I will attempt to add pictures one at a time,so keep checking this posting if you are interested.
View attachment 303
View attachment 302
O.K.,took a while. This drill is about 14" long. It is not a copy of any existing 19th.C. drill,but there are a few of this nature that were apparently made as one-off projects by the workmen themselves. Too expensive a drill to market,I suppose.
The handles are rosewood. The 1/2" diameter drill rod bar going down the center line of the drill is hardened,and has a 60º tip on it which serves as a thrust bearing for the small bevel gear.
The tool steel chuck is a simple,early style,which accepts 1/4" shank spade bits of different diameters on their cutting ends. There are "tommy bar" holes on both handles,minimizing the number of tools needed to take the drill apart,and using those same tightening holes as extra artistic touches(compared to hex nuts.)
The moldings turned on the large gear were turned with freehand tools in the metal lathe,just as wood is turned. In early days,metal was often turned freehand,before we had more advanced lathes with carriages and cross feeds.
I will attempt to add pictures one at a time,so keep checking this posting if you are interested.
View attachment 303
View attachment 302
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