Use of Vernier CaliperUse of Vernier Caliper

Vernier Caliper Vernier Caliper can be used to can be used to measure diameter, measure diameter, thickness very thickness very accurately.accurately.

Different Parts of Vernier CaliperDifferent Parts of Vernier Caliper

Inside Inside jawsjaws

Outside Outside jawsjaws

VernierVernierScaleScale

Main Main ScaleScale

Depth Depth GaugeGauge

Measuring Internal DiameterMeasuring Internal Diameter

Use the inside Use the inside jaws of the jaws of the caliper as showncaliper as shown

Measuring External DiameterMeasuring External Diameter

Use the outside jaws of Use the outside jaws of the caliper as shownthe caliper as shown

Measuring Depth of a HoleMeasuring Depth of a Hole

Use the depth Use the depth gauge of the gauge of the caliper as showncaliper as shown

Reading the Vernier ScaleReading the Vernier Scale

Read the “0” position of the Read the “0” position of the vernier scale on the main vernier scale on the main scale to get a rough reading.scale to get a rough reading.

Rough reading = 18mmRough reading = 18mm

Look along the vernier scale Look along the vernier scale until one of the vernier until one of the vernier division coincides with the division coincides with the main scalemain scale

Accurate reading = Accurate reading = 18.46mm±0.01 mm18.46mm±0.01 mm

ExerciseExerciseWhat is the reading in the caliper shown?What is the reading in the caliper shown?

Please click on one of the following answer.Please click on one of the following answer.

A. 3.51cm

B. 3.57cm

C. 3.62cm

D. 3.642cm

E. 3.67cm

3.5

0 5 10

3 4

overlap

0 5 10

3 4

overlap

SolutionSolution

Read the “0” position of the vernier scale on the main scale to get a rough reading.Rough reading = 3.6cmLook along the vernier scale until one of the vernier division coincides with the main scaleAccurate reading = 3.67cm±0.005cm