THE MOST ACCURATE MECHANICAL MEASURING TOOL?

In my opinion, the Indicator Tester (Micrometer) is the most accurate mechanical measuring tool. Unless you know of another better. If you do, please let me know.
This tool is not too popular in most shops unless they calibrate in-house. In this video, I'll show you the Starrett 716 and the advantages of using it.
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[@pcrengnr1]

Thx for taking the time sharing a very nice instrument. Of course at these are laboratory levels of accuracy. Temperature and temperature gradients have to be considered. Heat from your hand can influence these readings. The measured unit has to have temperature stabilization for several hours before they are measured.
So, this is all way overkill for a general machine shop. That doesn't mean that checking shop instruments isn't important these levels are relegated to calibration like you said.
Again thx for taking the time and exposing us to that type of instrument. It's nice to know what's out there. Starrett and Mitutoyo make their living on mechanical metrology and they've both gotten quite good at it over time. And don't forget all the NISTs in the world that calibrate the calibrators.

[@gregorynorth80]

Love it

[@HM-Projects]

Mitutoyo makes mechanical micrometers e.g. 103-130 that are accurate to 2um with vernier resolution of 1um. So perhaps slightly better than this Starrett one ?

[@TigermothRacingTV]

Ok yes .001mm is 39 millionths. That's an impressive direct read from a standard frame mic.

[@semirXLVII]

Great, do you know about the millionometer by Antoine LeCoultre?

[@TigermothRacingTV]

I had not seen that, thanks! One micron being about 4 millionths of an inch. I would not want to be responsible for calibration on that in 1844.

[@nickp4793]

Very nice, thanks for sharing. What was it like working at Starrett? What was your role at the company?

[@TigermothRacingTV]

Someday I should probably make a video about my experience at Starrett. To me it is a place full of history and ingenuity. It was a wonderful experience there for me and a rare opportunity. I was taken on by them to be on the methods engineering team to develop new processes, solve problems and implement new manufacturing technology. It was a perfect role for me and I might still be there if I did not receive an offer I could not refuse all the way out in California.

[@nickp4793]

@@TigermothRacingTV Thanks for sharing. That seems a special place just from your short paragraph.

[@micheal1012]

one of the most precise mechanical micrometers is the Van Kueren light wave micrometer. If memory serves me correctly it is accurate to 0.00000"

[@TigermothRacingTV]

Direct reading in millionths is impressive.

[@irish-simon]

the fact you are using inches is your first down fall

[@TigermothRacingTV]

Lol!

[@daveaspinall555]

so you can ACCURALTY say what the number is between 2 marker lines, then the conversion to metric, you could be miles out..
LINEAR GAUGE