Go / No-Go Gauge

Many parts and instruments have specifications that call for a tolerance. That just means that there is a given range within which the part has acceptable quality.

One way to determine if the part is good is to measure and compare the results to the specification. This, however, is a slow process.

An alternative is to use a Go/No-Go Gauge. This tool requires a part to complete two tests. The part must fit one of the gauges that measures one extreme of the tolerance (i.e. “Go”) and must not fit the other extreme (i.e. “No-Go”).

Go/No-Go Gauge for Lottery Balls

This simple form of test is quick and generally accurate due to its simplicity.