For the measurement of the inner diameter of drills for example inside micrometers can be used.
They exist as 2-point of 3-point inside micrometer.
The advantage of 3-point-inside micrometer is its selfcentering.
Inside micrometers cannot be used for measuring roundness.
There are point and line measuring surfaces as well as the special case of beak measuring surfaces.
Measuring Technology: 3-point inside micrometer for the measuring of inner diameters.
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
