Common Methods of Measuring the Diameter of a Hole

[TomG]

Here's a short video that I threw together on my lunch hour showing various methods of measuring the diameter of a bored hole. Most of it is fairly basic and commonly known techniques except for the part showing how to use a telescoping gauge. I've noticed that very few new machinists and even a few experienced machinists on these forums actually know how to use one properly, so that was the driving force behind making this video.

Tom