How are items manufactured with such precision, when it requires a machine with precise parts to manufacture the items (which presumably requires another machine to produce it’s parts)? Does everything eventually trace back to handmade parts or tools?

Question

How are items manufactured with such precision, when it requires a machine with precise parts to manufacture the items (which presumably requires another machine to produce it’s parts)? Does everything eventually trace back to handmade parts or tools?

In: 9

Answer 1

If you are interested in more modern, there’s a YouTube video by Machine Thinking that covers the move into true precision.

I program and run mills and lathes. How precise these machines are usually comes down to manufacturing tolerances, which can be simplified to fit of parts, and the repeatability/rigidity of the parts making the machines.