In our third measurement lesson we learned how to use a micrometer to measure objects. It can be tricky at times but once you get the hand of it it’s pretty easy.
The object that is being measured is placed between the anvil and spindle.
Then the first thing you do is look at the course reading. The value you take is the last fully visible line on the sleeve.
Next you figure out the barrel scale reading by looking at the reference line on the sleeve. The line that it matches up with on the barrel scale is the number that you take. If the line is in the middle of two numbers, you take the number that the line is closest to.
Lastly you add the course reading and the barrel scale reading to get the micrometer reading.
Here is an example along with a picture to show you where all the parts are on a micrometer.