What is Engineering Drawing and Instrument Of Engineering Drawing.

1. DJJ1012ENGINEERING DRAWING
Class 01
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2. WHAT IS ENGINEERING DRAWING ??
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3. •An engineering drawingis a document that communicates a precise description of a part.
•This description consists of pictures, words, numbers and symbols.
•Together, these elements communicate part information to all drawing users.
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4. •In the past most engineering drawings were created by manual methods.
•Tools like drawing boards, T-squares, compasses, triangles, etc. were used.
•The original drawing was created on paper, vellum or Mylar that could be used for making blueprints.
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5. Today ….
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6. •Engineers created drawings using a computer.
•The designer creates an electronic version of a drawing.
•The original drawing is a computer file.
•Copies are made on a printer or plotter.
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7. •Whether engineering drawings are manual drawings or computer generated their purpose remains the same:
•To record and communicate design information.
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8. Type Of ENGINEERING DRAWING ??
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9. •Geometrical Drawing
•Mechanical Engineering Drawing
•Civil Engineering Drawing
•Electrical Engineering Drawing
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10. Geometrical Drawing
•The art representation of geometrical objects such as rectangular, square, cube, cone, cylinder, sphere, etc. on a paper
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11. Geometrical Drawing
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12. Mechanical Engineering Drawing
•The art representation of mechanical engineering object such as mashines, machine parts, etcs. on a paper.
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13. Mechanical Engineering Drawing
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14. Civil Engineering Drawing
•The art representation of civil engineering object such as roads, buildings, bridges, dams, etcs. on a paper
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15. Civil Engineering Drawing
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16. Electrical Engineering Drawing
•The art representation of electrical engineering object such as motors, generators, transfomers, poles, towers, wiring diagrams, etcs. on a paper
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17. Electrical Engineering Drawing
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18. ENGINEERING DRAWING Instrument
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19. Drawing Board
•Drawing Board Size : 60cm x 80cm.
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20. Drawing Board
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21. Drawing Board
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22. Drawing Table
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23. Drawing Paper
•ANSI standard measure (American National Standard Institute) for drawing paper was as follows:
•A. 8.5” x 11”A.9” x 12”
•B.11” x 17”B.12” x 15”
•C.17” x 22”C.18” x 24”
•D.22” x 34”D.24” x 36”
•E.34” x 44”E.36” x 48”
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25. T-Square
•Divided into two principal divisions namely
–head portion
–blade part
•Driver to draw vertical line and horizontal straight lines with using set square.
•During T angle's usage, it used close with left board
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26. T-Square
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27. T-Square
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28. Compass
•Used to form a circle line or arc.
•Consisting of two sticks that the one end could be met and can be adjusted.
•One end contain trick to be put on-centred something circle, or arc and end that another is pencil to draw line.
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29. Compass
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30. Divider
•Nearly identical with compass, the difference divider have two needle points.
•Divider used to divide something distance to several same division too or to move something distance once or repeat.
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31. Divider
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32. Protractor
•To get point of angle or to measure the angle
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33. Set square
•To get point of angle or to measure the angle
•Set square can give some degree of angle.
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34. Set squareSuhaimi Said (PKS)

35. Set square
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36. Scale / Measure
•Not for making line, but only used as measure tool only.
•Scale that used must be in a unit only to avoid confusion or mistake when making measurement.
•After we get some measure, pencil used as marker to that measure.
•More accurate marking can be gained by using divider or compass.
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37. Scale / Measure
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38. French Curve
•Used to draw accurate line that could not be drawn with compass.
•Have many type of shape.
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39. French Curve
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40. Flexible French Curve
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41. Pencil
•Drawing Pencils is the most important tool used in engineering drawing.
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42. Pencil
•Drawing Pencils are made in different grades. Suhaimi Said (PKS)

43. Pencil
•The "HB" grade pencil is medium soft and dark in black colour, whereas 1H, 2H, grade pencils hard and light in black colour.
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44. Pencil
•"HB" Pencil is used for free hand works. Thin and light lines drawn by 1H & 2H pencils. Suhaimi Said (PKS)

45. Mechanical Pencils
•Size : 0.3, 0.5, 0.7, 0.9
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46. Eraser
•Used to erase line that draw by pencil.
•High quality eraser required : to avoid line that erase not leave effect to drawing paper surface.
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47. Eraser Shield
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