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Dimension Tolerance - Coggle Diagram
Dimension Tolerance
Types Of Dimensionings
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Chain Dimensioning
Should only be used if the function of the object would not be affected by the accumulation of tolerances
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Dimensioning of Circle, Arc, Hole
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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
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Dimension lines, extension lines and object outlines should not cross or overlap
Types of Tolerances
Bilateral Tolerance: allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
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In practice, parts cannot be manufactured exactly to the dimensions stated in the drawing, due to manufacturing variations. Tolerances are included with dimensions in engineering drawings to take into account these manufacturing limitations