Micrometer
Micrometer
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This article is about the measuring device. For the unit of length, see Micrometre. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2011)
Modern micrometer (value: 1.64 milimeters)
Outside, inside, and depth micrometers
A micrometer (pron.: /maɪˈkrɒmɨtər/ US dict: mī•krŏm′•ĭ•tər), 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 often, but not always, in the form of calipers.
Colloquially the word micrometer is often shortened to mike or mic (/ˈmaɪk/) (US dict: mīk′).
Contents
[hide]
• 1 History of the device and its name
• 2 Types o 2.1 Basic types o 2.2 Specialized types
• 3 Operating principles
• 4 Parts
• 5 Reading o 5.1 Inch system o 5.2 Metric system o 5.3 Vernier
• 6 Torque repeatability via torque-limiting ratchets or sleeves
• 7 Calibration: testing and adjusting o 7.1 Testing o 7.2 Adjustment
• 8 Zero error
• 9 See also
• 10 References o 10.1 Bibliography
• 11 External links
[edit] History of the device and its name
Gascoigne's Micrometer as drawn by Robert Hooke
The word micrometer is a neoclassical coinage from Greek micros, "small", and metron, "measure". The Merriam-Webster Collegiate Dictionary[1] says that English got it from French and that its first known appearance in English writing was in 1670. Neither the metre nor the micrometre nor the micrometer (device) as we know them today existed at that time. However, humans of that time did have much need for, and interest in, the ability to measure
From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about the measuring device. For the unit of length, see Micrometre. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2011)
Modern micrometer (value: 1.64 milimeters)
Outside, inside, and depth micrometers
A micrometer (pron.: /maɪˈkrɒmɨtər/ US dict: mī•krŏm′•ĭ•tər), 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 often, but not always, in the form of calipers.
Colloquially the word micrometer is often shortened to mike or mic (/ˈmaɪk/) (US dict: mīk′).
Contents
[hide]
• 1 History of the device and its name
• 2 Types o 2.1 Basic types o 2.2 Specialized types
• 3 Operating principles
• 4 Parts
• 5 Reading o 5.1 Inch system o 5.2 Metric system o 5.3 Vernier
• 6 Torque repeatability via torque-limiting ratchets or sleeves
• 7 Calibration: testing and adjusting o 7.1 Testing o 7.2 Adjustment
• 8 Zero error
• 9 See also
• 10 References o 10.1 Bibliography
• 11 External links
[edit] History of the device and its name
Gascoigne's Micrometer as drawn by Robert Hooke
The word micrometer is a neoclassical coinage from Greek micros, "small", and metron, "measure". The Merriam-Webster Collegiate Dictionary[1] says that English got it from French and that its first known appearance in English writing was in 1670. Neither the metre nor the micrometre nor the micrometer (device) as we know them today existed at that time. However, humans of that time did have much need for, and interest in, the ability to measure