Understanding Metrology Measurement Units - Inch & Metric

Thou isn't a word. I despise it.
Secondly, 1 thousandths. 1 is singular.
And a tenth is .1
My biggest gripe with this is when you're communicating with customers who don't know the slang. It gets confusing.
And micron is used in the filter industry. Its said and written all the time.

If you are using imperial measuement, you are not professional. I truly enjoyed the metric portions of your talk.

Now i want an explanation of why machinists reduce fractions...

If i ask for a piece of material 32/64 inches in length you better not give me a piece of material a 1/2 inch long...

Using the imperial system in 2023 is silly... Using it when you actually care about precision and accuracy is lunacy.

If you use the spelling of the unit as metre, like the rest of the world😅, then there is a distinction between a micrometer(meter being a measuring device) and a micrometre(metre being a unit of length).

Gonna rupture some mathematicians' cranium 😂

Metro city....Metracity...potato?...patatow? Spider....Spee eye der!...(DreamWorks animation, Megamind). Anyone relate?

so if 3 ten thousandths of an inch are said like 3 tenths, how do you actually say 3 tenths then?

Thank you Dr. Salsbury. That took me back to the mid ‘60s when I was an apprentice toolmaker in the UK - yes, we used imperial measurements back in those happy days before we joined the German Empire (The EU) of which we are now happily free.

Hi handsome. Thank you for time.

Jim , can you speak about torque wrench use and Calibration and how often ,must be calibres

I don't know what I was expecting, but I'm laughing to myself that the video series on metrology is extremely high quality. Of course it is, that's what you specialize in. Haha!

Only 3 country in the world are not using metric system ...

I wish the manufactures would make this tool with considerations and features that prevented some of the human error. They are the most inaccurate of my tools because the object could be placed.

Is 5 tenths of a thousand and 10 microns the same ?

The correct answer is to just get rid of the imperial system and never say "thousandths" again.

Great its very helpful...Thanks from INDIA 🇮🇳

Excellent content, very nicely done tutorial, thank you.

One of the best videos on this subject. Have shared it with several people. Great work Dr. Salsbury!

This worked for me thank you

🔥👏👏

Excellent presentation. This is the way units of measurement should be discussed — engineering and machinist’s practice without the politics.

The word "micrometer", when referring to the tool comes from the Greek, meaning small measure. Long before the Metric system was established.

Wow this answered a lot of random questions that bug me every now and then.
One of those was that I could never seem to fathom what 1 micron was, now I've got a much better understanding of it
Great video!

The measuring tool is a micrometer, like a tool that measures speed is a speedometer, and a tool that measures temperature is a thermometer. That's the difference in pronunciation between a measuring tool and the 0.001 mm micrometer. Easy.

Explained perfectly

Lol this guy is great

There is no such thing as an inch

If you were going to write the of .0005” in slang would it be five ten th’s?

What about "mil" which is 1/1000 of an inch?


"mil" comes from the Latin word "mille" meaning "One Thousand."



You Know?
- 1 Millennium = 1000 years.
- Mile (Mille Passus) = 1000 paces.
- 1 mm = .001 m ... 1 m = 1000 mm.
- 1 mL = .001 L... 1 L = 1000 mL
- 1 ms = .001 s.... 1 s = 1000 ms.
- 1 mil = .001"... 1" = 1000 mils.

Micrometer, the unit is micrometre!

Please could you recommend a book of measurement techniques for various situations and applications? It seems to be extremely hard to find resources for basic measurement techniques. I am a homeshop machinist.

Excellent thank you

About time someone posted a great video on Metrology. THANK YOU!

You might want to go back and check the auto generated closed captioning.

Thank you for posting such instructive videos !

Great video! Thanks for making these available to everyone!

This is great stuff. Thanks for the videos!