The caliper, also called caliper, is a measuring instrument with greater precision than a millimeter rule.
The gauge has several jaws and a probe with which outer diameters, inner diameters and depths can be easily measured.
Its vernier also called vernier scale is an auxiliary scale that allows the measurement of distances with a precision from 0.1 millimeters to 0.02 millimeters. This precision improves 10 times or more the precision of a millimeter ruler.
A gauge is made up of the following parts:
- External measuring jaws.
- Internal measuring jaws.
- Probe to measure depths.
- Millimeter main scale.
- Vernier to read fractions of millimeters.
- Slide button.
- Brake screw.
- Slide (moving part of the gauge).
- Rule (fixed part of the gauge).
Carrying out measurements¶
In the following images you can see how measurements of the exterior, interior and depth of a part are taken.
Measurement with the vernier¶
The measurement in millimeters of a gauge can be seen on the main scale, where it coincides with the 0 mark of the vernier.
The measurement in tenths of a millimeter can be observed at the point where one of the lines of the vernier coincides exactly with a line of the main scale.
Sheet with exercises to read distances with the caliper