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dimensions in drawing - Coggle Diagram

- - - - bilateral tolerance
        
        it is to vary in two directions from the specified dimension. both directions do need to be the same amount.
      - unilateral tolerance
        
        it only can vary in one direction
      - limited tolerance
        
        there is a specific dimension for both upper and lower limits
    - - tolerance= upper limit - lower limit
    - - clearance fit
        
        it refers to the size of the hole is bigger than the size of the object and there is sufficient space left
      - interference fit
        
        it refers to the size of the object is bigger than the size of the hole and there is no sufficient space left
  - - - it refers to the multiple parts that are bought together to define a larger, more complex product representation.
      - how does it work?
        
        when constructing an assembly usually starts with a base component, this is because of its central role.
        
        each component is required to be oriented and located and relative to other component in assembly.
        assembly joints are used between elements and component.
    - - rigid joint
        
        fixes 2 components to each other and does not have degree
      - revolute joint
        
        has a single rotational degree of freedom, like a hinge