Eli5 How was the first industrial machine made without the precision of machinery?

Question

How do you make a machine that has perfectly flat/plumb/level metal components without the aide of a machine to begin with?

In: 224

Answer 1

It is known as the mother of machine tools, as it was the first machine tool that led to the invention of other machine tools. The first fully documented, all-metal slide rest lathe was invented by Jacques de Vaucanson around 1751.