why do we use measuring tools? what tools will we use? how do we read measuring tools? where are...

•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, and micrometers

•Complete a worksheet on measuring tools

•Measuring “jigs” before starting a job

•While working on a job

•To check dimensions after completing a job

•Least Precise •Accuracy of 1/16” (.0625”)

•Used on large items and “non-precision” work

•Available in various lengths

•Divided into increments of 1/16”(standard) *sometimes smaller

•Metric on the opposite side•Bold numbers indicate inches

•Accuracy of .001” •0” – 6” , 0” – 12” , 0” – 36”

•Used on precision jobs

•Measures Outside Diameters, Inside Diameters,And Depths

1.Dial2.Jaws3.Nibs4.Bar5.Clamp Screw

•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”

•Most accurate •Accuracy of .0001”

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

•Used to measure Outside Diameters

thimblesleeveanvilspindle

frame

1.Frame2.Thimble3.Sleeve4.Spindle5.Anvil

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

One mark pastlargest sleeve

reading

0.025

Thimble Reading

0.016

0.341 inches

•Serves the same purposes as conventional Calipers and micrometers

•Easier to read due to digital read-out

•Usually more expensive

Get out a sheet of paper . . .

•Name the following tools :

1.2.

3.

4.

5. What tool is the most accurate?

6. What tool is the least accurate?

7. What are the three things calipers are used to measure?

8. Why do we use measuring tools?

•Name this tool:

9.

10.What is one job that uses measuringtools that we discussed?

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

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