Alphabet Of Lines

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Alphabet Of Lines

  1. 1. Alphabet of Lines<br />
  2. 2. The line conventions recommended by the American National Standards Institute (ANSI)<br /> are used in the following figures, together with <br />illustrations showing its application. <br />
  3. 3. Example:<br /><ul><li>Dark, heavy lines.
  4. 4. Show the outline and shape of an object.
  5. 5. Define features you can see in a particular view.</li></li></ul><li>Example:<br /><ul><li>Light, narrow, short, dashed lines.
  6. 6. Shows the outline of a feature that can not be seen in a particular view.
  7. 7. Used to help clarify a feature, but can be omitted if they clutter a drawing.</li></li></ul><li>SectionLine<br />Example<br /><ul><li>Thin line usually drawn at a 45 degree angle.
  8. 8. Indicates the material that has been cut through in a sectional view.</li></li></ul><li>Example:<br /><ul><li>Thin line consisting of long and short dashes.
  9. 9. Shows the center of holes, slots, paths of rotation, and symmetrical objects.</li></li></ul><li>Example<br /><ul><li>Dark, heavy lines.
  10. 10. Show the length, width, and height of the features of an object.
  11. 11. Terminated with arrowheads at the end.</li></li></ul><li>Example<br /><ul><li>Thick broken line that is terminated with short 90 degree arrowheads.
  12. 12. Shows where a part is mentally cut in half to better see the interior detail.</li></li></ul><li>Example<br /><ul><li>Thick wavy line.
  13. 13. Used to break the edge or surface of a part for clarity of a hidden surface.</li></li></ul><li>Example<br /><ul><li>Long, thin lines.
  14. 14. Used to show that the middle section of an object has been removed so it can be drawn on a smaller piece of paper.</li></li></ul><li>Phantom Lines<br />Example<br />Thin lines made up of long dashes alternating with pairs of short dashes.<br />Three purposes in drawings.<br /> 1. To show the alternate position of <br /> moving parts.<br /> 2. To show the relationship of parts <br /> that fit together.<br /> 3. To show repeated detail.<br />
  15. 15. Examples<br />
  16. 16. Example<br />

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