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2. Micrometer (device) - Wikipedia

   en.wikipedia.org/wiki/Micrometer_(device)

   A micrometer, sometimes known as a micrometer screw gauge (MSG), is a device incorporating a calibrated screw widely used for accurate measurement of components [1] in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers.

3. Hegman gauge - Wikipedia

   en.wikipedia.org/wiki/Hegman_gauge

   The grooves decrease in depth from one end of the block to the other, according to a scale stamped next to them. A typical Hegman gauge is 170mm by 65mm by 15mm, with a channel of grooves running lengthwise, 12.5mm across and narrowing uniformly in depth from 100 μm to zero and used to determine particle size. [3]

4. Coordinate-measuring machine - Wikipedia

   en.wikipedia.org/wiki/Coordinate-measuring_machine

   Typical probe repeatability can result in measurements within one micron or 0.00005 inch (half a ten thousandth) over the entire measurement volume. For 3, 3+2, and 5 axis machines, probes are routinely calibrated using traceable standards and the machine movement is verified using gauges to ensure accuracy.

5. Bore gauge - Wikipedia

   en.wikipedia.org/wiki/Bore_gauge

   The gauges are locked by twisting the knurled end of the handles; this action is performed to exert a small amount of friction on the telescopic portions of the gauge (the smaller diameter rods found at the T head of the gauge). To use, the gauge is inserted at a slight angle to the bore and gently locked to a size slightly larger than the bore ...

6. Supersymmetric gauge theory - Wikipedia

   en.wikipedia.org/wiki/Supersymmetric_gauge_theory

   However, we need to convert gauge I to gauge II, transforming X to (e −V) q X. So, the gauge invariant quantity is X e −qV X. In gauge I, we still have the residual gauge e Λ where ¯ ˙ = and in gauge II, we have the residual gauge e Λ satisfying d α Λ = 0. Under the residual gauges, the bridge transforms as

7. Gauge (instrument) - Wikipedia

   en.wikipedia.org/wiki/Gauge_(instrument)

   Dial indicator, also known as a dial test indicator, dial gauge, or probe indicator an instrument used to accurately measure small linear distances. Feeler gauge: a simple tool used to measure gap widths. Gauge block, (also known as a gage block, Johansson gauge, slip gauge, or Jo block) a precision ground and lapped length measuring standard.