Orthographic Projection

Review

Isometric Drawings to appear three dimensional, a 30

degree angle is applied to its sides Dimensions still stay the same

Review contingued

Oblique Drawings (for a cube) Draw the front (is parallel to you) or

side view of the object. All measurements drawn backwards are

half the original measurement.

45 degrees is the angle for all lines drawn backwards

Orthographic Projections

Ortho – Greek word meaning perpendicular Show the views of an object projected

in 2-D Usual views are the top, front and right

side of the object

Imagine the following

If object were surrounded by a glass cube

We could see on each of the cube’s faces a projection of the object within view

Orthographic projections

Unfold the cube so all the views lye in one plane

The three views are now on a single sheet

The three views

Front view Height and width

Top view Width and depth

Right view Depth and height

Make sure your views are aligned (and to scale)

Make sure to include details

Do your orthographic drawings with a Title Block Border

Instructions: All drawings must be on a clean blank,

not 3-hole punched sheet of 215mm x 279mm paper (8-1/2” x 11”). The template must have a border and a title block. When you draw a part you must also include the title, scale, date and your full name in block letters within the title block. Refer to included diagram.

To Create The Border: 1. Draw a rectangle 10mm inside all four

sides of the sheet.

Instructions continued

To Create The Title Block: 1. Draw a horizontal line between the left and right

borders 7mm above the bottom border. 2. Draw a horizontal line between the left and right

borders 3mm above the first line. 3. Draw a horizontal line between the left and right

borders 5mm above the second line. 4. Draw a vertical line between the bottom border

and the third line 75mm from the left border. 5. Draw a vertical line between the bottom border

and the third line 125mm from the left border 6. Draw a vertical line between the bottom border

and the third line 100mm from the right border. 7. Write the title, scale, date and your full name

5mm from the left vertical lines within the title block.

Example

Should be similar to

Draw an orthographic drawing for the following using the following dimension

6 cm4.5 cm

4.5 cm

1.5 cm 1.5 cm

1.5 cm

Drawing #2 This one has a scale in mm