How to use calipers

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Calipers with a dial are much easier to read than the old dial-less slide vernier calipers.
They eliminate the eye strain. Always double check a caliper reading!
Vernier calipers with a dial can jump a setting. Even better are the digital calipers below.

dial calipers

The above caliper reading is .510 thousandths.

Click on pic...
The above caliper reading is .750 thousandths.

Dial vernier calipers should be stored in a dry, humid free location, and
checked often for correct calibration. They can be wiped off with oil, but any
build-up of oil will collect dirt. Also the tips should be checked for wear.
Digital calipers are becoming more popular, probably because they have less
tendency to skip gears. Digital vernier calipers are very accurate and the batteries
last a long time on most brand units.

Digital Vernier Calipers...click on above.

________________

A little History of Calipers...
Although calipers were around since the first century or earlier in China,
the "graduated" caliper is credited to Pierre Vernier.

Pierre Vernier (1584-1683) was taught mathematics and science by his father who was a lawyer and engineer. He worked on cartography and on surveying. His interest in surveying led to developing instruments for surveying and this prompted the invention for which he is remembered by all scientists, the "graduated" vernier.
In his book he describes his most famous invention, that of the vernier caliper, an instrument for accurately measuring length. It has two graduated scales, a main scale like a ruler and a second scale that slides
parallel to the main scale and enables readings to be made to a minute fraction of a
division on the main scale.

Back to..How to read a micrometer

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TAGS .. micrometer and caliper...mispelled words..tabl saw, tabel saw, tabal saw,