Ep

One possible displacement of feature-relating tolerance zone framework (FRTZF) relative to pattern-locating tolerance zone framework (PLTZF).

Unusable area

Actual feature axis shown at Its maximum inclination

Unusable area

Drawing With Positional Tolerancing

One possible displacement of actual feature axis at MMC. The actual feature axis must be within both tolerance cylinders. The feature pattern, as a group, may be displaced within the usable confines of the feature-relating tolerance cylinders

Feature

Pattern-locating tolerance zone cylinder

Feature

Pattern-locating tolerance zone cylinder

Tolderancing Hole Patterns

Feature-relating tolerance zone cylinder

One possible displacement of actual feature pattern (one hole shown).

FIG. 5-25 RADIAL HOLE PATTERN LOCATED BY COMPOSITE POSITIONAL TOLERANCING (CONT'D) Tolerance Zones for Radial Hole Pattern (Confd)

Pattern Locating Tolerance ZoneName Point Perspective Lesson

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