Home Technology What are the 4 Basic Components Of Engineering Drawings

What are the 4 Basic Components Of Engineering Drawings

Engineering Drawings

A subcategory of technical drawings, an engineering drawing’s purpose is to detail all the necessary information for manufacturing a product or apart. The drawings use simple symbols and language so it’s easy to understand and interpret.

Applications of engineering drawings include but are not limited to :

  • Construction of buildings, roads, bridges, and dams.
  • Manufacturing electronics like TVs, phones, and computers.
  • Manufacturing machines and automobiles.
  • Can be used in navigation for ships.

Perhaps you’re a builder. Or maybe you’re looking to design your future home, with details down to the T. In any case, bringing in to play engineering drawing services can make your mission easier and save a ton of your valuable time.

The 4 basic, most important components of engineering drawings are discussed below.

Lines And Their Types

Lines are a key part of engineering drawings. Here are the different types of lines used in engineering drawings.

Continuous Lines – The most common type of line, continuous lines represent the physical boundaries of objects.

Hidden Lines – Hidden lines, like the name, suggests, show something otherwise not visible in the drawings.

Center Lines – Centre lines are used to show symmetric properties of parts and holes.

Extension Lines – Extension lines construe what exactly is being measured.

Break Lines – Break lines indicate that a view has been broken.

Views And Their Different Types

A view is the angle of the object or design the drawing represents. Pro tip? Only include a view if it helps to communicate the overall understanding of the design. Some of the different types of views are :

Isometric View – Isometric drawings show parts in a three-dimensional way. Vertical lines stay the way they are, while parallel lines are shown at a 30-degree angle.

Orthographic View – The foundation blocks of engineering drawings, an orthographic view is a way of representing a 3D object in 2 dimensional way.

You should ideally use a multiview to communicate all information. These views include:

  • Front View
  • Top View
  • Side View

Flat Pattern – If you are working with a folded sheet metal part, this view is vital.

Section View – Section view displays some of the part features that are not apparent when looking from the starting point.

Cutout View – Similar to the section view, the only difference is that this view features cutouts.

Detail View – With this view, you get a close-up of a specific section that is part of a bigger view.

Auxiliary View – Are used to show planes that are not vertical or horizontal.


Dimensioning is the process of specifying a part’s information by the use of lines, numbers, symbols, and notes. New and emerging technology means that  CNC machines can read the dimensions straight from the lines, which is a rather cool feature!

Information Blocks

Often seen on the side of drawings, these blocks detail things like author’s name, part name, part number, quantity, coating, scale, etc.

Additionally, information blocks include a BOM (bill of materials). This lists elements used in the assembly, along with extra information like part names, quantities, etc.

Engineers spend at least a couple of hours of their time making engineering drawings. If this is outsourced by taking assistance from engineering drawing services, it can help you save time and effort.

Hopefully, this article has provided you with more information about engineering drawings and their main components.


Please enter your comment!
Please enter your name here