My HF mics repeat every time to the thousandths place plus to what division your eye can make out. They are very smooth & thimble feels consistent. Years ago I was talking to my uncle that has been a machinist all his life. I was asking about how to know that a tool reading 1" was truly 1". His response was the most of the time it doesn't matter. Most parts are built from a stranded that is in shop so as long as it is repeatable that is the most important part. Once in a while he would have to work fron another shops standards & had to have calibrated tools that he keep locked up until needed to to build the standard in his shop then his employees would work off that part for production. He still didn't buy tools as cheap as I do. Lol. He considered $100 a cheap at of dial calipers & they were only good for rough work. My calipers seem to always be 1ths lighter then my mics but I can see how much heavy or light of 1ths with the mics where the calipers round it for me. Not that I get that picky most of the time.
Anyhow I think I sidetracked this far enough but the point is still related. He did measure my standards that came with my $30 3 piece set from HF 20 years ago & said they were the same as his as close as my mics could measure.
Anyhow I think I sidetracked this far enough but the point is still related. He did measure my standards that came with my $30 3 piece set from HF 20 years ago & said they were the same as his as close as my mics could measure.