Reading Measuring Tools

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Reading Measuring Tools
Original Power Point Created by Scott
Sommerlatte Modified by Georgia Agricultural
Education Curriculum Office May 2007
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Objectives

• Why do we use measuring tools?

• What tools will we use?

• How do we read measuring tools?

• Where are these tools used in industry?

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Activities

• Make measurements with dial calipers,
• and micrometers

• Complete a worksheet on measuring tools

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Why do we use measuring tools?
To ensure accuracy

• Measuring jigs before starting a job

• While working on a job

• To check dimensions after completing a job

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The Tools
Dial Calipers
Micrometers
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Calipers

• 0 6 , 0 12 , 0 36

• Accuracy of .001

• Used on precision jobs

• Measures Outside Diameters, Inside Diameters,
• And Depths

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Parts of the calipers
clamp screw
nibs
bar
dial
jaws
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What are the 5 parts of the caliper ?

1. Dial
2. Jaws
3. Nibs
4. Bar
5. Clamp Screw

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Reading Calipers

• Each increment on the bar represents .100

• Each round on the dial equals .100 or .200
• Depending on the brand of the tool

• Bold numbers on the dial represent .010

• Small dashes equal .001

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Micrometers

• Accuracy of .0001

• Most accurate

• Available in various sizes, from 0 1 up to
  35 36

• Used to measure Outside Diameters

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Parts of the micrometer
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What are the 5 parts of the micrometer ?

1. Frame
2. Thimble
3. Sleeve
4. Spindle
5. Anvil

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Reading the micrometer
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An Example
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0.000
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0.300
0.025
0.016
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Digital Calipers and Micrometers
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Digital Calipers and Micrometers

• Serves the same purposes as conventional
• Calipers and micrometers

• Easier to read due to digital read-out

• Usually more expensive

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Where are these tools used ?
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construction
Automotive
Machine Shops
Any Others ?
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Get out a sheet of paper . . .
Measuring Tools Quiz
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• Name the following tools

1.
2.
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• 3. What are the three things calipers are
• used to measure?
• 4. Why do we use measuring tools?

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• Name this tool

5.
6. What is one job that uses measuring tools
that we discussed?
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BONUS ! !

• Name the 5 parts of the calipers .
• 1 point each

• Name the 5 parts of the micrometer .
• 1 point each