mechanical engineering drawing

1. Introduction
There are many different ways
of communicating ideas,
information, instruction, etc.
They can be transmitted by
signs or gestures, by words of
mouth, in writing, or
graphically.
Engineering drawing is a
graphical language used by
those concerned with the
constructive arts: in the
manufacturing of machinery,
structure, ships, aircraft, and so
on.

2. Drawing Office
Personnel
Job Descriptions
Chief Designer
Whatever device is to be designed then it
will be the responsibility of the Chief
Designer to ensure:
• Function
• Life and reliability
• Accuracy
• Materials
• Methods of manufacture
• Quantity
Drawing Office Personnel
The drafting office is the starting point for all engineering work. Below is the
job description of drawing office personnel;

3. Draftsman
The work include, changing a design sketch into a
clear accurate working drawing, from which
blueprints are made for the craftsman to work from
when making the components.
Checker
The completed working drawing is passed on to the
checker who scrutinizes the drawing for
completeness and accuracy.
Tracer
The completed working drawing may have to be
produced in large quantities for various stages of
manufacture. The copies need to be clear and robust.
The finalized drawing is traced onto a suitable
material from which prints are made for
distribution.
Drawing Office Personnel
Continuations....

4. Drafting/Drawing Equipments
Set Square: 45°-45°-90°
Set Square: 30°-60°-90°
Pencils
Scale Rule
Erasers
Tape (masking tape)
Protractor
T-Rule
Wooden Drawing Board
French curve
The following are essential, and should be purchased by all students of graphical
communication before commencement of study and drawing practices:

5. Drawing Presentations

6. Drawing Presentations
Continuations....

7. Types of Drawing Papers
In Engineering Drawing,
it is a compulsory for
students to know the
drawing paper sizes:

8. Application of the types of Lines