ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.249 General_tolerances

A General_tolerances is a set of default values for dimension or geometric tolerances.

The default values are specified in a table where the correct tolerance type and values are provided per range of dimension or according to the number of significant digits of the dimension. These default values are overwritten by tolerances that are assigned explicitly to particular aspects of the shape. The concept of General_tolerances is defined in ISO 2768 [14][15].

EXAMPLE The General_tolerances specifies, e.g., that for the tolerance class 'f' the tolerance value 'FORMULA' is applicable for length dimensions between 30 mm and 120 mm. Figure 41 depicts an example for General_tolerances.

The data associated with a General_tolerances are the following:

4.2.249.1 table_definition

The table_definition specifies the contents of the General_tolerances that is defined either explicitly in a General_tolerance_table or in a document.

See general_tolerances to document_file and general_tolerances to general_tolerance_table for the application assertions.

There shall be exactly one object that defines the table_definition for a General_tolerances.

4.2.249.2 tolerance_class

The tolerance_class specifies the class as defined in the tolerance table that applies in the given context.



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