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I agree that a caliper with a resolution of .001 is all you need. Harbor Freight has them for about $15 and they work fine. It is what I tell my students to buy and we check them in our lab routinely with gauge blocks, never had an issue with accuracy. Over many years they won't hold up as well as the expensive ones, but most will never use them enough to find that out.If you need .0001, micrometers can be purchased at HF for not much more, but you don't need one for this work.
I agree that a caliper with a resolution of .001 is all you need. Harbor Freight has them for about $15 and they work fine. It is what I tell my students to buy and we check them in our lab routinely with gauge blocks, never had an issue with accuracy. Over many years they won't hold up as well as the expensive ones, but most will never use them enough to find that out.
If you need .0001, micrometers can be purchased at HF for not much more, but you don't need one for this work.
