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Reading Measuring Tools

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Why do we use measuring tools? What tools will we use? How do we read measuring tools? Where are these tools used in industry? Make measurements with rulers, calipers ... – PowerPoint PPT presentation

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Title: Reading Measuring Tools


1
Reading Measuring Tools
2
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?

3
Activities
  • Make measurements with rulers, calipers,
  • and micrometers
  • Complete a worksheet on measuring tools

4
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

5
The Tools
Ruler / Tape
Calipers
Micrometers
6
Ruler / Tape
  • Least Precise
  • Accuracy of 1/16 (.0625)
  • Used on large items and non-precision work
  • Available in various lengths

7
Tapes Rulers
  • Divided into increments of 1/16(standard)
  • sometimes smaller
  • Metric on the opposite side
  • Bold numbers indicate inches

8
Calipers
  • 0 6 , 0 12 , 0 36
  • Accuracy of .001
  • Used on precision jobs
  • Measures Outside Diameters, Inside Diameters,
  • And Depths

9
Parts of the calipers
clamp screw
nibs
bar
dial
jaws
10
What are the 5 parts of the caliper ?
  1. Dial
  2. Jaws
  3. Nibs
  4. Bar
  5. Clamp Screw

11
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

12
Micrometers
  • Accuracy of .0001
  • Most accurate
  • Available in various sizes, from 0 1 up to
    35 36
  • Used to measure Outside Diameters

13
Parts of the micrometer
14
What are the 5 parts of the micrometer ?
  1. Frame
  2. Thimble
  3. Sleeve
  4. Spindle
  5. Anvil

15
Reading the micrometer
16
An Example
19
18
17
16
0.000
15
14
13
0.300
0.025
0.016
17
Digital Calipers and Micrometers
18
Digital Calipers and Micrometers
  • Serves the same purposes as conventional
  • Calipers and micrometers
  • Easier to read due to digital read-out
  • Usually more expensive

19
Where are these tools used ?
20
construction
Automotive
Machine Shops
Any Others ?
21
Get out a sheet of paper . . .
Measuring Tools Quiz
22
  • Name the following tools

2.
1.
3.
4.
23
  • 5. What tool is the most accurate?
  • What tool is the least accurate?
  • What are the three things calipers are
  • used to measure?
  • Why do we use measuring tools?

24
  • Name this tool

9.
  • What is one job that uses measuring
  • tools that we discussed?

25
BONUS ! !
  • Name the 5 parts of the calipers .
  • 1 point each
  • Name the 5 parts of the micrometer .
  • 1 point each
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