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Lesson 6 Dimensions, Tolerance and Assemblies, Type of Dimensioning -…
Lesson 6 Dimensions, Tolerance and Assemblies
Dimensions
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Extension Line Offset, a gap between object surface and extension line to avoid confusion
Importance of Tolerance
Tolerances are included with dimensions in engineering drawings to take into account these manufacturing limitations
Parts cannot be manufactured exactly to the dimensions stated in the drawing, due to manufacturing variations
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Types of Tolerance
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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Type of Dimensioning
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Dimensioning of Circle, Arc and Hole
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