Transcript How to Read a Micrometer - L

How to Read a Micrometer
Because we don’t have any of these…
Parts of a Micrometer…
Reading a micrometer takes practice.
Ratchet
To learn to read the mike you need to
understand the Thimble and the Sleeve:
-The Sleeve does not move. It looks like a
ruler with ten numbers. The space between
each number is divided into quarters.
-The Thimble rotates around this Sleeve it
covers up, or reveals the numbers marked on
the Sleeve.
It is easy to read a micrometer if you think of the markings
on the Sleeve as dollars and quarters.
Here’s a few basic practice
problems…
2 Number
=.200
0 Sleeve Graduations
=.000
0 Thimble Graduations =.000
Total reading
=.200
Example 2:
2 Number
= .200
1 Sleeve Graduation
= .025
0 Thimble Graduations =.000
Total reading
=.225
Example 3:
3 Number
= .300
3 Sleeve Graduations
= .075
0 Thimble Graduations = .000
Total reading
= .375
If you think of the lines on the Sleeve as dollars and
quarters, the lines on the Thimble represent "pennies" or
cents.
As the thimble rotates, you add those
pennies to the dollars and quarters
Here’s more practice…
4
Number
= .400
3
Sleeve Graduations
= .075
12 Thimble Graduations = .012
Total reading
= .487
Example 2:
5 Number
= .500
2 Sleeve Graduations = .050
2 Thimble Graduations =.002
Total reading
= .552
Example 3:
0
Number
= .000
0
Sleeve Graduation
= .000
23 Thimble Graduations = .023
Total reading
= .023
Last but not least…
8 Number
= .800
1 Sleeve Graduation
= .025
6 Thimble Graduations = .006
Total
reading
= .831