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# Solution of Dial Indicator Reading and Interpretation Exercises

`Reading and interpretation of dial indicator in thousandth millimeter or milesimal.`

Solution of the exercises list: Dial Indicator – Reading and interpretation exercises – Metrology

The dial indicators printed in the exercises page has the span (range) of 10mm and resolution of 0.01mm (0.01 – 10.00mm) or span of one inch (1″) and resolution of 0.001in (1 – 0.001in).

## Solution of dial indicator exercises in millimeter

observation

lap counter

main dial

interpretation

x 1mm

x 0.01mm

lap counter
+
main dial

1.

<1

42

0.42mm

the pointer of the main dial has not complete full turn and swept 42 marks.
0 x 1mm + 42 x 0.01 mm = 0.42 mm

2.

5

4(5)

5.04mm

the pointer of the main dial completed five turns, and swept 4 marks stopping between the 4th and 5th mark. The number was not rounded, because 4 is an even number. Another possible interpretation is 5.045 mm

3.

2

29

2.29mm

4.

9

85(5)

9.86mm

the pointer of the main dial completed nine turns, and swept 85 marks stopping between the 85th and 86th mark. The number was rounded up, because five is an odd number. Another possible interpretation is 9.855mm

5.

9

3

9.03mm

6.

3

6

3.06mm

7.

1

52

1.52mm

8.

4

97(5)

4.98mm

apparently the lap counter counted five millimeters. It’s missing 0.02mm for the main dial to take five turns.
Another possible interpretation is 4.975 mm

9.

2

63

2.63mm

10.

9

86(5)

9.86mm

Other possible interpretation is 9.865mm

11.

8

98(5)

8.98mm

Other possible interpretation is 8,985mm

12.

1

28

1.28mm

the fact that the pointer of the main dial stop at an intermediate position (between two marks) was compensated for the fact that it started from an intermediate position

13.

<1

52(5)

0.52mm

Other possible interpretation is 0,525mm

14.

5

2(5)

5.02mm

Other possible interpretation is 5,025mm

15.

7

60(5)

7.61mm

Other possible interpretation is 7,605mm

16.

9

85(5)

9,86mm

Other possible interpretation is 9,855mm

17.

8

98(5)

8.98mm

same condition as ex. 11°.
check if you interpretate the same value at both results

18.

1

31

1.31mm

obs.

the signal ‘<1’ means that this pointer did not sweep a sector> = 36° (less than one full turn of the pointer of the main dial)

‘(5)’ means that the pointer is between two marks (0.005 mm)

the values were rounded by the rule

– even keep it

## Solution of dial indicator exercises in inch

obsercation

lap counter

main dial

interpretation

x 0.1in

x 0.001in

lap counter
+
main dial

1.

<1

42

0.042in

the pointer of the main dial has not complete full turn and swept 42 marks.
0 x 0.1in + 42 x 0.001in = 0.042in

2.

5

4(5)

0.504in

the pointer of the main dial completed five turns, and swept 4 marks stopping between the 4th and 5th mark. The number was not rounded, because 4 is an even number. Another possible interpretation is 0.5045in

3.

2

29

0.229in

4.

9

85(5)

0.986in

the pointer of the main dial completed nine turns, and swept 85 marks stopping between the 85th and 86th mark. The number was rounded up, because five is an odd number. Another possible interpretation is 0.9855in

5.

9

3

0.903in

6.

3

6

0.306in

7.

1

52

0.152in

8.

4

97(5)

0.498in

apparently the lap counter counted five millimeters. It’s missing 0.002in for the main dial to take five turns.
Another possible interpretation is 0.4975 in

9.

2

63

0.263in

10.

9

86(5)

0.986in

Other possible interpretation is 0.9865in

11.

8

98(5)

0.898in

Other possible interpretation is 0.8985in

12.

1

28

0.128in

(between two marks) was compensated for the fact that it started from an intermediate position

13.

<1

52(5)

0.052in

Other possible interpretation is 0.0525in

14.

5

2(5)

0.502in

Other possible interpretation is 0.5025in

15.

7

60(5)

0.761in

Other possible interpretation is 0.7605in

16.

9

85(5)

0.986in

Other possible interpretation is 0.9855in

17.

8

98(5)

0.898in

same condition as ex. 11°.
check if you interpretate the same value at both results

18.

1

31

0.131in

obs.

the signal ‘<1’ means that this pointer did not sweep a sector> = 36° (less than one full turn of the pointer of the main dial)

‘(5)’ means that the pointer is between two marks (0.0005 in)

the values were rounded by the rule

– even keep it