What is the purpose of a Dial Bore Gauge?

The purpose of a Dial Bore Gauge is primarily to measure the internal diameter of holes or cylindrical features within a workpiece. It utilizes a dial indicator to provide precise readings, allowing for accurate assessments of the bore size, as well as checking for roundness and taper. This is crucial in machining and quality control processes, where ensuring that internal dimensions meet specified tolerances is required for the part to function properly within assembly applications.

This tool is particularly important because many components require specific internal diameters to fit correctly with other parts, and deviations can result in mechanical failure or poor performance. The design of the gauge allows it to be easily inserted into the bore and adjusted to contact the inside walls securely, enabling a reliable and accurate measurement.