Please enable JavaScript.
Coggle requires JavaScript to display documents.
Dimensions & Tolerance - Coggle Diagram
Dimensions & Tolerance
Dimensions in Drawings
How to Dimension
-
-
-
Extension Line
Extension lines continue or extend from the surface of the object and establish the size of the dimension
Extension Line Offset
A gap between the object surface and the extension line, so it is not confused with the visible lines of the model
Types of Dimensioning
Parallel Dimensioning (Datum Dimensioning) Consists of several dimensions originating from a common reference surface (also known as the datum).
Superimposed Running Dimensioning: Simplifies parallel dimensions in order to reduce the space used on a drawing.
Chain Dimensioning: Should only be used if the function of the object would not be affected by the accumulation of the tolerances.
-
-
-
-
-
Dimensioning of circle, arc and hole
-
Rules of Dimensioning
Dimensions should not be duplicated, i.e. same dimension should not be repeated on different views, or the same information need not be given in two different ways
-
Dimension lines, extension lines and object outlines should not cross or overlap
Tolerances
-
Bilateral Tolerance: allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
-
-
-
-
-
-