ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.257 Geometric_tolerance

A Geometric_tolerance is the allowable deviation of shape characteristics as defined in ISO 1101 [9].

Each Geometric_tolerance is a Cylindricity_tolerance, a Line_profile_tolerance, a Symmetry_tolerance, a Straightness_tolerance, a Flatness_tolerance, a Position_tolerance, a Circular_runout_tolerance, a Surface_profile_tolerance, a Total_runout_tolerance, a Perpendicularity_tolerance, a Parallelism_tolerance, a Concentricity_tolerance, an Angularity_tolerance, a Coaxiality_tolerance, or a Roundness_tolerance.

The data associated with a Geometric_tolerance are the following:

4.2.257.1 is_applied_to

The is_applied_to specifies the shape that the Geometric_tolerance is associated to.

See geometric_tolerance to annotation_curve, geometric_tolerance to constructive_geometric_element, geometric_tolerance to derived_geometry, and geometric_tolerance to shape_element for the application assertions.

There shall be exactly one object that the Geometric_tolerance is_applied_to.

4.2.257.2 modification

The modification specifies the Tolerance_condition that is associated with the application or the Geometric_tolerance.

See geometric_tolerance to tolerance_condition for the application assertion.

The modification need not be specified for a particular Geometric_tolerance.

4.2.257.3 name

The name specifies the word or group of words by which the Geometric_tolerance is referred to.

See geometric_tolerance to multi_language_string for the application assertion.

The name need not be specified for a particular Geometric_tolerance.

If present, there shall be exactly one object that defines the name for a Geometric_tolerance.

4.2.257.4 qualifying_note

The qualifying_note specifies additional constraints on the Geometric_tolerance.

EXAMPLE 'not concave' is an example for the qualifying_note.

See geometric_tolerance to multi_language_string for the application assertion.

The qualifying_note need not be specified for a particular Geometric_tolerance.

If present, there shall be exactly one object that defines the qualifying_note for a Geometric_tolerance.

4.2.257.5 segment_size

The segment_size specifies the length of a segment. All along any segment of this size, taken on the toleranced element, the toleranced element shall conform to the tolerance.

The segment_size need not be specified for a particular Geometric_tolerance.

4.2.257.6 significant_digits

The significant_digits specify the number of decimal digits indicating the accuracy of the tolerance value.

The significant_digits need not be specified for a particular Geometric_tolerance.

4.2.257.7 tolerance_value

The tolerance_value specifies the tolerance magnitude expressed by a length measure with unit.

4.2.257.8 value_determination

The value_determination specifies classification information on how the Geometric_tolerance shall be interpreted without giving details.

Where applicable the following values shall be used:

NOTE A Geometric_tolerance may be specified in the design stage of a product but it may also be documented as measured on a manufactured part.

The value_determination need not be specified for a particular Geometric_tolerance.

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