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

2. Different Parts of Vernier Caliper
Main Scale
Depth Gauge
Inside jaws
VernierScale
Outside jaws
The Mission Covenant Church Holm Glad College

3. Measuring Internal Diameter
Use the inside jaws of the caliper as shown

4. Measuring External Diameter
Use the outside jaws of the caliper as shown
The Mission Covenant Church Holm Glad College

5. Measuring Depth of a Hole
Use the depth gauge of the caliper as shown

6. Reading the Vernier Scale
Read the “0” position of the vernier scale on the main scale to get a rough reading.
Rough reading = 18mm
Look along the vernier scale until one of the vernier division coincides with the main scale
Accurate reading = 18.46mm±0.01 mm
The Mission Covenant Church Holm Glad College

7. Exercise What is the reading in the caliper shown?
Please click on one of the following answer. 5 10 3 4
overlap
A. 3.51cm
B. 3.57cm
C. 3.62cm
3.5
D cm
E. 3.67cm

8. You Are Wrong!
Try Again
See the Solution

9. Congratulation! You are Right!

10. Solution
Read the “0” position of the vernier scale on the main scale to get a rough reading.
Rough reading = 3.6cm
Look along the vernier scale until one of the vernier division coincides with the main scale
Accurate reading = 3.67cm±0.005cm 5 10 3 4
overlap