Adjustable Shaft(for measurement)

[jdm2008]

I am looking for an adjusable shaft to measure the perpendicularity of a hole. The problem is that the hole can varry in diameter by quite a bit(.015).
The same concept is used in a bore mic but I do not need to actually measure the hole.

 

[btrueblood]

A set of gage pins is the usual approach - i.e. pick the tightest/best fitting pin and go from there.

 

[ajack1]

Depending on the accuracy required could you use or make something like an adjustable reamer?

 

[Compositepro]

Many bore gages can be mechanically locked to hold the reading. Sounds like that is exactly what you are asking for.