1. Engineering Drawing Ahmed Sultan AL Ya’rubi Office: 27-9

2. Objectives
Introduction
Lettering
Basic Geometry
Exercising

3. Sketching
Although most final drawings are computer generated, initial and freehand sketches are vital to the design process
Freehand does not mean messy. Sketches should display an adequate amount of detail, and any pertinent notes/comments pertaining to the drawing.
Sketching is a rapid, freehand method of drawing without the use of drawing instruments. Sketching is also a thinking process and a method of communication.

4. Engineering Drawing Rules
Always use a Pencil.
Make all lettering the same size.
Use Engineering or Drafting Paper.

5. Pencil Techniques
The best pencil for lettering on most surfaces are the H, F, and HB grades.
Hold your pencil in the position shown. It should make approximately a 60o angle with the paper.

6. Pencil Lead Designation
Note: Reverse order below

7. Sketching Tips: General
Relax and draw in a direction comfortable to you
Mark end points of the lines to be sketched and draw between them
Draw long lines as a series of short ones
Use grid paper when available
We will be doing a lot of freehand sketching. T-square, triangles and straight edges will be added later. Do expect neat and clear work. THIS TAKES GOOD TECHNIQUE AND PRACTICE.

8. Sketching Tips
Sketching straignt lines does not mean they have to look like they are machine drawn.

9. Sketching Tips: Construction Lines
Use construction lines
Begin by drawing bounding boxes with construction lines
Make construction lines much lighter and thinner than finished lines
Identify the major features and overall dimensions
Leave construction lines on the sketch

10. Drawing Circles Two methods for sketching circles
Box in diameter and mark radius
Draw center-point lines and mark radius

11. Sketching techniques Use very light construction lines
“Box in” the rough outline of the object
Darken only the lines you wish to keep
Clean up the edges and rough spots

12. Sketching Tips
If you don’t have a ruler, you can estimate dimensions using your pencil when sketching
Always keep your pencil at arms length. Why?

13. Sketching Tips
Layout of drawing using your pencil for dimensional reference

14. Lettering

15. Lettering with Fractions

16. Basic Geometry
Drawing Sheet & Title Block
Lines
Geometrical shapes

17. Drawing Sheet & Title Block

18. Drawing Lines

19. Drawing Lines

20. Drawing Lines

21. Exercise 1 & 2
Lines
Geometrical Shapes (Sketching)

22. Exercise 1 & 2

23. Assignment 1

24. Assignment 2