Dimensioning
- An Overview
A dimensioned drawing should provide all the information necessary for a finished product or part to be manufactured. An example dimension is shown below.
Dimensions are always drawn using continuous thin lines. Two projection lines indicate where the dimension starts and finishes. Projection lines do not touch the object and are drawn perpendicular to the element you are dimensioning.
In general units can be omitted from dimensions if a statement of the units is included on your drawing. The general convention is to dimension in mm's.
All dimensions less than 1 should have a leading zero. i.e. .35 should be written as 0.35
Lettering
All notes and dimensions should be clear and easy to read. In general all notes should be written in capital letters to aid legibility. All lettering should be of the same size and preferably no smaller than 3mm. An example typeface is shown below.
Page last updated by Paul Hudson
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