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Dimensions, Tolerance and Assemblies, 3 types of tolerance, Tolerance is…

- - - - -dimension line
        
        -extension line
        
        -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
        
        Extension lines continue or extend from the surface of the object and establish the size of the dimension. They do not touch the object lines and extend slightly past the dimension line.
        
        It has an arrowhead on each end.
      - ±0.2 is the tolerance. It defines how much the dimension is allowed to deviate.
- - - - -Chain Dimensioning
        
        -Combined Dimensioning
        
        -Dimensioning Small Features
        
        -Dimensioning of Multiple Features
        
        -Dimensioning of Radius
        
        -Dimensioning of Circle, Arc, and Hole
        
        2 more items...
        
        It starts with capital R
        
        To dimension multiple same dimensions, use N x Dimension
        
        Arrows to be placed outside the extension lines instead so that it is easier to read
        
        Use both chain and parallel dimensioning
        
        Should only be used if the function of the object would not be affected by the accumulation of the tolerances
      - Simplifies parallel dimensions in order to reduce the space used on a drawing
- - - - -Dimension lines, extension lines and object outlines should not cross or overlap
- - - - -If tolerance is not given, exact measurement of the parts must be made. Rejection rate will be very high and is not realistic.
        
        The range of tolerance will translate into the manufacturing method needed, since different manufacturing method has different degree of tolerance.
        
        Same parts can be made from different companies and they have to be interchangeable. Tolerance ensures good quality control for parts from different companies.
        
        Tolerance will ensure that mating parts of an assembly interface and fit well.
- - - - Revolute
        
        Slider
        
        Cylindrical
        
        Pin Slot
        
        Planar
        
        Ball
        
        Has a single rotational degree of freedom, much like a hinge.
      - Fixes two components to one another; it provides no degrees of freedom.