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Reading Measuring Tools

Reading Measuring Tools. 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?. Activities. Make measurements with rulers, calipers, and micrometers. Complete a worksheet on measuring tools.

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Reading Measuring Tools

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  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 ? • Dial • Jaws • Nibs • Bar • 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. sleeve thimble anvil spindle frame Parts of the micrometer

  14. What are the 5 parts of the micrometer ? • Frame • Thimble • Sleeve • Spindle • Anvil

  15. Reading the micrometer

  16. Smallest Measurement Largest sleeve reading 0 1 2 3 4 5 6 7 8 9 15 18 0 1 2 3 17 0.341 inches One mark past largest sleeve reading 16 15 14 13 Thimble Reading 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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