Know your height gages for efficient and accurate measurements. A height gage does exactly as its name indicates—measures the height of a workpiece. A height gage is a measuring instrument in which a slider with a measuring stylus moves relative to a measuring scale on a beam and in which this motion is along a single vertical axis nominally perpendicular to a reference plane on the instrument base. Height gages are normally used on a granite surface plate to measure and/or scribe part features from a datum plane. Generally a scriber, test indicator, touch probe or CMM-style probe is used to locate the measured feature. Height gages are an indispensable instrument for quality control. There are several types of mechanical and electronic height gages to choose from, depending on a company’s needs and budget. Mechanical height gages have been...