2. Brian Briggs Community Colleges of Spokane

3. #1: Rulers There are three types of rulers for machinists: Flex Rules Spring and Hook Rules Ground or Rigid Rules

4. Rulers Flex Rules: Thin and flexible. 6, 12, or 18 inches They are universal tools. These rulers can help you double-check your work.

5. How to Use a Ruler Please watch the video below. http://www.youtube.com/watch?v=RFoXIsk y2cY

6. Rulers Spring and Hook Rulers Adjustable

7. Rulers Ground or Rigid Rules 12, 18, 24, and 36 inch sizes The picture on the right shows a ruler with a square, a protractor, and a centering head.

8. #2: Calipers Vernier Calipers--still used in schools because they are very strong and easy to use. Industry still uses the longer 18-inch Vernier calipers. Dial Calipers Electronic Calipers

9. Calipers Zero Dial (Digital)

10. #3: Outside Micrometers Carbide-wear tips Insulated handle Tenths of an inch scale on sleeve

11. How to Read a Standard Micrometer Please watch the video below.

12. #4: Height Gages This tool is used for both measuring and layout work. It measures how tall something is. A height gage sits on a flat surface (such as a table) and measures up.

13. #5: Indicators Both types are precise and delicate. They measure 1/1,000 or 1/10,000 Probe type: small and versatile Travel type: more sturdy and measure greater ranges.

14. Vocabulary Probe \ ˈ prōb\ (noun) Caliper \ ˈ ka-l ə -p ə r\ (noun) Attachment \ ə - ˈ tach-m ə nt\ (noun) Micrometer \mī- ˈ krä-m ə -t ə r\ (noun) Zero \ ˈ zē-( ˌ )rō\ 0, 1, 2, 3, 4…

15. Vocabulary Dial \ ˈ dī(- ə )l\ (noun) dial indicator Indicator \ ˈ in-d ə - ˌ kā-t ə r\ (noun) indicate (v) Specialized (adj) special, specialize \ ˈ spe-sh ə - ˌ līz\(v) Rigid \ ˈ ri-j ə d\ (adj) rigidity Ruler \ ˈ rü-l ə r\ (noun)

16. Vocabulary Accuracy \ ˈ a-ky ə -r ə -sē\ (noun) accurate (adj) Scale \ ˈ skāl\ (noun) Height \ ˈ hīt\ (noun) Metric \ ˈ me-trik\ (adj) Precision \pri- ˈ si-zh ə n\ (noun), precise \pri- ˈ sīs\ (adj)

17. Now… Ask your teacher or classmates about any words you dont understand. Finish the assignments and quizzes for this lesson. Unless otherwise specified, this work by Air Washington is licensed under a Creative Commons Attribution 3.0 United States License.Air WashingtonCreative Commons Attribution 3.0 United States License