Definitions

(a) A non-rigid part relates to the condition of that part which deforms in its free state to an extent beyond the dimensional and geometrical tolerances on the drawing.

(b) Free-state relates to the condition of a part when subjected only to the force of gravity.

Figure 20.33 shows a typical application of a buffer detail drawing. In its restrained condition, datum's A and B position the buffer.

Interpretation: the geometrical tolerance followed by symbol (F) is maintained in its free state. Other geometrical tolerances apply in its assembled situation.

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1

A

Fig. 20.33

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