How does the scale of a metric micrometer work?
How does the scale of a
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Measurements provided by a micrometer are made up of a combination of values taken from the sleeve scale, the thimble scale and, on some micrometers, the vernier scale. | |||
Micrometer sleeve scale |
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The sleeve scale of a metric micrometer has a measuring range of 25mm.
It is graduated in millimetres and half millimetres. The scale is numbered every 5mm. |
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Micrometer thimble scale |
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The thimble scale has a measuring range of 0.5mm (the smallest value that can be measured on the sleeve scale).
It is divided into 50 increments, with each increment representing 0.01mm (0.5 ÷ 50 = 0.01). The scale is numbered every 0.05mm. |
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Micrometer vernier scale |
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Some also have a vernier scale on the sleeve, which provides the user with readings of even greater accuracy (to 0.001mm).
The vernier scale has a range of 0.01mm and is graduated in 10 increments, each of which represents 0.001mm. The scale is numbered every 0.002mm. |
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