Mechanical Micrometer Calibration and Measurement Accuracy - Metrology Training Lab

I didn't need a history lesson on micrometers. I came to this video for the exact thing that it was titled, calibration. This video showed nothing about how to calibrate a micrometer.

Measurement accuracy is not a function of resolution, no matter between lines or digital. There are resolution requirements in accuracy classification but repeatability, reproducibility and bias are major contributors in any measurements including linear ones.

This was very informative! Thank you.

Can you use feeler guages to verify the accuracy of a ball micrometer?

Question for anybody; how does a surface plate work in the world of calibration of tooling like micrometers, dial indicators, etc…I’m new to this stuff and wondering why a flat surface plate is needed for anything?!?? Pardon my ignorance on this subject. Thanks.

If someone take a measurement by guessing (aka higher than the resolution). He/She have to write it down on the recording. So if the meas is 2.2505" and the resolution of the instrument is .001" the record must be written as 2.2505"±.001". Just to give the information of the uncertainty that the record of the measurement has.

This is why I prefer mechanical mics over digital. If the lines are fine enough, you can even split the vernier scale to read half microns/tenths.

Plz make video on bore dial gauge.