What is one method used for measuring hole sizes accurately?

Using a go/no-go gauge is an effective method for accurately measuring hole sizes. This type of gauge involves two distinct sides: one that checks for the minimum acceptable size (the "go" side) and another that checks for the maximum acceptable size (the "no-go" side). If a hole fits onto the go side but does not fit onto the no-go side, it is deemed to be within the acceptable size range. This method is particularly beneficial in precision machining where tight tolerances are required, as it provides a clear pass/fail indication rather than a specific measurement.

While other tools, such as micrometers, calipers, and rulers, can be used for measuring hole sizes, they typically provide numerical measurements which may require interpretation and careful handling to ensure accuracy. In contrast, the go/no-go gauge simplifies the process by establishing a binary result, which is crucial when determining whether parts meet specific specifications in manufacturing environments.