Today’s digital indicators are not only replacing dial indicators in some instances, but they are also approaching the performance of bench amplifiers at a fraction of the cost.
Are we taking advantage of the vast amounts of dimensional information that a gage or hand tool can produce? Certainly not if the information presented on the gage display reads only “over,” “under” or “good.”
Gages and measuring instruments come in different shapes and sizes. Whether it be a snap gage, a bench stand, a surface-finish gage or even a form system, keeping the “measuring loop” as small or as short as possible is important for better gage performance.
The many design modifications available in snap gages enables them to measure some of the most difficult dimensions, right at the point of manufacture.
All fixtures for part gaging will have some amount of deflection or spring rate that can affect measurement accuracy. A better understanding of spring rate can enable quality control inspectors to detect and eliminate this possible error source.