Gauge (instrument)

A lesson in the art, a device that represents a reference standard for predetermined sizes and shapes. The doctrine embodies the physical dimensions and shapes ( solid measure ). Lessons come in metrology, production and assembly are used. In metrology, and in machine and plant construction, they are usually made of hardened gauge steel, while the measuring surfaces often finely ground carbide and in the rule or is lapped. The tolerances are hanging from or of the underlying standards, if there is no corresponding standard or does not apply, determined according to the constructional aspects.

Lessons have been created to allow easy checking of default dimensions. Your application provides as opposed to measuring procedures are less sources of error and provides a clear statement (Good or committee ).

With teachings can not, as is often assumed, can be measured, as the check with a gauge makes no numerical value. It can only be compared to the target state ( teaching) with the actual state of the specimen. An example of this is the well-known also under the name of " caliper " caliper, which embodies a particular size with a locking screw and is therefore only be described as teaching.

Testing

• Maßlehren belong to a gauge set, wherein the measure of teaching increases to teaching. See gauge blocks and feeler gauges
• Form doctrines permit the question, among others, radii, angles, cones threads
• Limit gauges represent the allowable maximum and minimum of bores, shafts and threads

Production

• Drilling jigs lay the geometric position of the hole on a workpiece firmly
• Falsework shall determine the geometric shape of a building, for example, bridge or arch