Methods of applying the tolerance frame to the toleranced feature
Figures 20.4 and 20.5 illustrate alternative methods of referring the tolerance to the surface or the plane itself. Note that in Fig. 20.5 the dimension line and frame leader line are offset.
The tolerance frame as shown in Fig. 20.6 refers to the axis or median plane only of the dimensioned feature.
Figure 20.7 illustrates the method of referring the tolerance to the axis or median plane. Note that the dimension line and frame leader line are drawn in line.
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