Mechanical Drawings

How are tolerances shown on an Engineering Drawing

How are tolerances shown on an Engineering Drawing?

What are tolerances? Tolerances refer to the amount a dimension my vary from it’s maximum to its minimum value. Tolerances can be indicated as a unilateral tolerance or a bilateral tolerance. Unilateral Tolerance The Unilateral Tolerance (as shown) indicates the base dimension and how much the actual manufactured dimension may vary from this dimension. As …

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Different types of Views on Engineering Drawings

Different types of Views on Engineering Drawings

Did you know, Views are the building blocks of engineering drawings. Without different views, engineering drawings cannot exist, so understanding how views are used on drawings is a critical. Different views: Base views Projected views Sectional views Auxiliary views Partial views Interrupted views Before kicking off with the different views, it is worth a mention …

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Different line types used on Engineering Drawings

Different line types used on Engineering Drawings

Certain features on a Engineering Drawing requires specific ways of indication. For example, holes require center lines to identify the center and show that it is round. Hidden detail are shown with a certain line type to avoid confusion with visible edges. Most CAD Software packages will have these different line types predefined as layers. …

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The difference between first angle and third angle projection systems

The difference between first angle and third angle projection systems

When reading a Engineering drawing, one needs to communicate how the different views was taken from a three dimensional (3D) object. I have found a easy way to show students how projection is done and never make them forget it again! There are two different types of projection methods in Engineering drawings, namely First Angled …

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