Figure 19.10 shows an example of unilateral limits, where the maximum and minimum limits of size are disposed on the same side of the basic size. This system is preferred since the basic size is used for the GO limit gauge; changes in the magnitude of the tolerance affect only the size of the other gauge dimension, the NOT GO gauge size.
Figure 19.11 shows an example of bilateral limits, where the limits are disposed above and below the basic size.
Minimum limit Maximum limit Fig. 19.10 Unilateral limits
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