1. Precision Measurement
Vernier Calipers and Micrometers in Metric and Imperial
M.Friesen 2017

2. Vernier Calipers STANDARD DIAL DIGITAL Metric/Imperial Metric/Imperial

3. Standard Comes in Metric and Imperial measurements with scales on the top and bottom.
Main Scale
Vernier Scale
Sizes can range from 6” (15cm) – 12” (30cm)

4. HOW TO READ METRIC
10 mm
0.02mm
0.10 mm

5. Closest measurable tolerance
READING METRIC
20 mm +
1 mm +
0.02 mm =
21.02mm
0.02mm
Closest measurable tolerance

6. HOW TO READ IMPERIAL (Decimal)
0.001 Inch
0.10 Inch (4 x 0.025”)
1 Inch (10 x 0.100”)

7. READING IMPERIAL (Decimal)
1.000” +
0.050” +
0.023”
= ”

8. DIAL CALIPERS

9. HOW TO READ METRIC
Instead of a sliding Vernier Scale, a dial caliper uses a dial.
Each increment is 0.01mm
ANSWER?
16.20mm

10. HOW TO READ IMPERIAL 1.682” This Imperial dial is divided in half.
Each increment is 0.001”
You could also find both Metric and Imperial dials that are not divided.
ANSWER?
1.682”

11. DIGITAL CALIPERS
Can be changed from Metric to Imperial by the push of a button

12. MICROMETERS Standard Micrometer Metric/Imperial
Vernier Style Micrometer

13. THE PARTS OF A MICROMETER
Metric or Imperial

14. For a micrometer to work effectively we need to know the approximate size before using this precision instrument

15. READING METRIC
0 – 25mm
0.01mm
5mm +
0.50mm +
0.28mm
= 5.78mm

16. READING METRIC WITH A VERNIER SCALE
0 – 25mm
0.001mm 5
5mm +
0.50mm +
0.28mm +
0.003mm
= 5.783mm

17. Lines in between dollars = QUARTERS
READING IMPERIAL
0 – 1”
0.001”
0 – 24 = CENTS
0.001
Lines in between dollars = QUARTERS
0.025
Large numbers = DOLLARS
0.100

18. READING IMPERIAL
0 – 1”
0.001”
.200” +
0.075” +
0.001”
= ”

19. READING IMPERIAL WITH A VERNIER SCALE
0 – 1”
0.0001”
0.2000”+
0.0750”+
0.0090” +
0.0005”
= ”

20. PHOTO CREDITS - GOOGLE IMAGES