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There straight line engines. They would be used to do engine turning on a flat surface such as a tie bar or cigarette lighter.
There is now a video of the machines online now: Tour of Engine Turning Lathes going to auction at AB Group Attleboro MA - YouTube
Very interesting to see. They are not being sold by Gold Machinery, but I agree that they will probably end up with them since they are in the same state. I often drool over some of the antiques that Gold has in their online stores - better than many museums.
The machines might be full of gold swarf.......I would imagine CNC graving machines would have made these well and truly obsolete.
You would be wrong ...the precision of this old tech is beyond what even a Kern can do
I wonder if this is really true.
The Indians are the main drivers these day in jewelry making machines, as they make around 40% of the world's gold jewelry these days, and most of it is for domestic consumption.
So we dont even see the machines, or the work made on them, in the USA.
I have a chunky Indian gold ring I bought probably 20 years ago in Malaysia, that has what I am pretty sure is CNC facetting on it, and the accuracy is quite good.
Companies like this make modern CNC jewlery machines in India for the Indian market- ball faceters, chain makers, and much more.
Cnc Bangle Machine Manufacturer,Cnc Bangle Machine Exporter & Supplier in Jamnagar India
check out this video of a machine that engraves bangle bracelets- https://youtu.be/fZDT651gZiA
looks like the Turks make machines like this too, which makes sense- the turks make machines to do anything. https://youtu.be/Gv9_3xWp4V0
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