A form tolerance that prescribes the largest possible deviation of a circle from its geometrical ideal form (Pfeifer and Schmitt 2010). The roundness tolerance determines that in each section perpendicular to the axis of a toleranced cone-formed element, the actual profile, or the actual contour line, must lie between two concentric circles within the same plane, which are at the distance of the tolerance value. For sphere-formed elements, this tolerance is valid for each intersection through the center.
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
- Pfeifer T, Schmitt R (2010) Fertigungsmesstechnik [Production metrology], 3rd edn. Oldenbourg, München (in German)Google Scholar