Cylindrical ring gages have a number of inspection purposes. They are used as Go/No-Go gages to inspect the outside diameter of a shaft or rod. They are masters for dial bore gages, internal micrometers and coordinate measuring machines (CMMs). 

This situation pops up quite regularly when a relatively simple feature such as the diameter of a hole in a machined part doesn’t appear to be right when the part is at the assembly stage of manufacture. Like similar disputes, the finger pointing begins and compromises are made but the problem doesn’t go away. 

The measurement of a drilled, reamed or formed hole depth may be inspected in a wide variety of methods. 

No one in their right—or left—mind would knowingly set something up to fail but too often they do just that without realizing it.

The use of the go/no-go fixed limit gage is considered one of the simplest forms of pass/fail attribute inspection.

A highly common application for gages is inspecting threaded holes and shafts.