Decimal-inch vernier caliper
The basic parts of a vernier caliper are a main scale, which is
similar to a steel rule with a fixed jaw, and a sliding jaw with a
vernier scale. The vernier scale slides parallel to the main scale
and provides a degree of precision to 0.001�? Calipers are available
in a wide range of lengths with different types of jaws and scaled
graduations. A vernier caliper, which is commonly used in machine
shops is as follow.
The main scale is divided into inches and the inches are divided
into 10 divisions each equal to 0.1 �? The 0.1 ″divisions are
divided into 4 parts each equal to 0.025�? The vernier scale consist
of 25 divisions.
A vernier scale has 25 divisions in a length equal to a length on
the main scale that has 24 divisions. The difference between a main
scale division and a vernier division is fo 0.025�?or 0.001�?