1. Print Reading

2. Types of Drawings Working- drawing used to produce objects
Assembly- shows object fully assembled
Detail- shows each part of assembly

3. Working Drawing

4. Assembly Drawing

5. Detail Drawing

6. Orthographic projection
a method of projection in which an object is depicted using lines & planes

7. Views
Direction from which an object is seen

8. Types of views Front view-most of the overall shape
Right side view- to the right of the front view
Left side view- to the left of the front view
Top view- view from above the front view
Bottom view- view below the front view
Back view- view directly opposite of the front view

9. Using a working drawing- Points
Each point on the object is given a lower-case letter or number
Start on the left hand side, closest to the viewer
Surface is defined by all of the letters on the corners of the surface
Separate with a COMMA

10. Using a working drawing
Lines are separated with a dash (-)

11. Types of Lines
Object lines- outline of the object that can be seen in that view

12. Hidden Lines
Cannot be seen in the view due to material in front of them.
Dashed lines
Thinner than object lines

13. Centerlines Center of a radius, circle, cylinder
Runs through exact center of a hole
Short and long dashes

14. Dimension Lines Placed ½” away from outer edge of object.
Skinny, with arrowhead

15. Extension Lines
End points of dimensioned lines are marked lines= extension lines
Thin solid lines

16. Section Lines Used when an inside feature needs to be shown
Hypothetically cuts an object in half
Shows direction of the cut
Thickest line. Long short short long

17. Leader Lines
Size of a corner radius or hole is given using a leader line
Leads to a clear area on drawing