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DIMENSIONS, TOLERANCES & INTERFERENCES - Coggle Diagram
DIMENSIONS, TOLERANCES & INTERFERENCES
DIMENSIONS
Parallel Dimensioning
Consists of several dimensions originating from a common reference surface (also known as the Datum).
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Chain Dimensioning
Should only be used if the function of the object would not be affected by the accumulation of the tolerances.
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Dimensioning of Circle, Arc & Hole
- A circle is dimensioned by its diameter
- An arc is dimensioned by its radius
- Holes are located by their centerlines
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TOLERANCES
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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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ASSEMBLIES
Multiple parts are brought together to define a larger, more complex product representation.
Facilitates the collaboration among designers, engineers, manufacturing technicians and others to ensure a product assembly works.
Constructing an assembly normally begins with bringing a base component, selected because of its central role
Each component brought in needs to be oriented and located relative to other components in the assembly