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Dimensions & tolerances - Coggle Diagram
Dimensions & tolerances
Dimensions
Parallel Dimensioning
Superimposed Running Dimensioning
Chain Dimensioning
Combined Dimensioning
Dimensioning small features
Dimensioning of multiple features
Dimensioning of circles
Dimensioning angles
Tolerances
Importance: parts cannot be manufactured exactly to the dimensions stated in the drawing
Bilateral Tolerances
only one direction
Unilateral Tolerances
vary in two directions
Limit Tolerances
the upper and lower limits of the dimension are specified
formula: upper limit - lower limit
Clearance fit
will always be sufficient clearance for the shaft to interface with the hole
still be an allowance for two parts to move
Interference fit
E.g the shaft is larger than the maximum hole diameter
difficult to move or remove the two interfacing parts