MICROMETER

Micrometer

A micrometer, sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw used widely for precise measurement of small distances in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers. Micrometers are usually, but not always, in the form of calipers, which is why micrometer caliper is another common name. The spindle is a very accurately machined screw. The object to be measured is placed between the spindle and the anvil. The spindle is moved inward by turning the ratchet knob or thimble until ...

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micrometer

Noun

  1. An SI/MKS unit of measure, the length of one one-millionth of a meter. Symbols: µm, um, rm

Noun (etymology 2)

  1. A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter.


The above text is a snippet from Wiktionary: micrometer
and as such is available under the Creative Commons Attribution/Share-Alike License.

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