Straightness is a form tolerance that prescribes the largest possible deviation of a line from its geometrical ideal form (Pfeifer and Schmitt 2010). For an axis, the straightness tolerance specifies that the derived median line must lie within some cylindrical zone whose diameter is the specified tolerance. For the line elements of a feature, the straightness tolerance specifies that each line element must lie in a zone bounded by two parallel lines that are separated by the specified tolerance and that are in the cutting plane defining the line element.
Theory and Application
- DIN EN ISO 1101 (2014) Geometrical product specifications (GPS): geometrical tolerancing – tolerances of form, orientation, location and run-out. Beuth, BerlinGoogle Scholar