Fig Radial Hole Pattern Located By Composite Positional Tolerancing

Cad Drawing Hole Position Tolerance

FIG. 6-24 RADIAL HOLE PATTERN LOCATED BY COMPOSITE POSITIONAL TOLERANCING (CONT'D)

Tolerance Zones for Radial Hole Pattern

FIG. 6-24 RADIAL HOLE PATTERN LOCATED BY COMPOSITE POSITIONAL TOLERANCING (CONT'D)

Tolerance Zones for Radial Hole Pattern

Hole Patterns Datums

4X 00.6 pattern-locating tolerance zone cylinders at MMC. Pattern-locating tolerance zone framework (PLTZF) la located and oriented relative to datum plane A and datum axis B (no rotational requirements)

\ r— 4X 00.25 feature-relating tolerance zone cylinders

\ / at MMC. Feature-relating tolerance zone framework

\ / (FRTZF) is oriented to datum plane A

Datum axis B

cylinders governed by 00.8 LLJ

pattern-locating tolerance > zone cylinders

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

Unusable area

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

Actual feature —' axis shown at its maximum inclination

Feature-relating tolerance zone cylinder

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

| FIG. 5-24(c)

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