reading the micrometer. objectives identify micrometer parts determine micrometer reading

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Reading the Micrometer

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Page 1: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Reading the Micrometer

Page 2: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Objectives

• Identify micrometer parts• Determine micrometer reading

Page 3: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

This is a English micrometer

thimblesleeveanvilspindle

frame

Page 4: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading
Page 5: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

0 1 2 3 4 5 6 7 8 9

0123

24

2223

For clarity we will use an animated figure.

Page 6: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Let’s take a closelook at the sleeve of the micrometer.

Page 7: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

0 1 2 3 4 5 6 7 8 9 0

0123

24

2223

0 1 2 3 4 5 6 7 8 9 0

1/10 inch (0.100)

25/1000 inch (0.025)

1/1000 inch (0.001)

One inch (1.000)

Page 8: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Now, an example...

Page 9: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

0 1 2 3 4 5 6 7 8 9

15161718

14 13

19

15

1716

1413

1815

0 1 2 3

Smallest Measurement

0.000

Largest sleeve reading

0.300

Now, an example...

One mark pastlargest sleeve

reading

0.025

Thimble Reading

0.016

0.341 inches

Page 10: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

A digital micrometer

Page 11: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Another example...

Page 12: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

20

15

0 1 2 3 4

2019181716

24232221

0

Smallest MeasurementLargest sleeve reading

Three marks past largest sleeve reading

Thimble Reading

3.0000.4000.0750.021

3.496 inches

Another example...

Page 13: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Review...

• Lightly tighten on object.• Determine smallest

measurement when micrometer is closed.

• Find largest visible number on sleeve and multiply times 0.100.

Page 14: Reading the Micrometer. Objectives Identify micrometer parts Determine micrometer reading

Review...

• Count number of marks past largest visible number on sleeve and multiply times 0.025.

• Multiply thimble reading times 0.001.

• Add all numbers to get answer.