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prcision lathes
how were the first precision lathes made, without a precision lathe available to turn the parts. were the gears of th eearly chronometers actually hand made???
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For more on marking an answer as the "Best Answer", please visit our FAQ.I don't know if it answers your exact question but here's a whole history of the development of the lathe
http://www.stuartking.co.uk/articles/lathe.htm
And yes I believe people like Harrison did make every gear by hand ( High boredom threshold!!)
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