Micrometer Calipers

1. What is the range of the most common inch and metric micrometers?
2. How many threads per inch are there on a standard inch micrometer?
3. For inch micrometers what is the value of:

(a)    each line on the sleeve?

(b)   each numbered line on the sleeve?

(c)    each line on the thimble?

4. What is the reading of the following inch micrometer settings?

5. What is the pitch of a metric micrometer screw thread?
6. What is the value of the following metric micrometer graduations?

(a)    each line on the sleeve?

(b)   each numbered line on the sleeve?

(c)    each line on the thimble?

7. What is the reading of the following metric micrometer settings?

Care of the Micrometer

8. Why should micrometers be handled with care?

Testing the Accuracy of Micrometers

9. Why should a micrometer be regularly tested for accuracy?
10. Describe two methods of testing the accuracy of a micrometer.

Measuring with a Micrometer

11. Describe how the correct tension or feel on a micrometer can be checked.
12. Explain how to hold a micrometer when measuring work in a machine.

Copyright 2004, Industrial Press, Inc., New York, NY