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Dimensions & Tolerances - Coggle Diagram
Dimensions & Tolerances
Calculating Tolerance
Tolerance is defined as the difference between the upper limit of a dimension and the lower limit of the dimension.
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Types of Dimensioning
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Dimensioning of Circle , Arc and Hole
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Rules of Dimensioning
Dimensions should not be duplicated. They should not have the same dimension , should not be repeated on different views or have the same information in two different ways
Dimension lines , extension lines and object outlines should not cross or overlap
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Type of Tolerance
Bilateral Tolerance
allowed to vary in two dimensions from the specified dimension. Both dimensions need not vary by the same amount
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Tolerances
Parts cannot be manufactured exactly int he dimensions stated int he drawing due to manufacturing variations
Tolerances are included with dimensions in engineering drawings to take into account these manufacturing limitations