ABSTRACT
Form tolerances are not included in most linear tolerance stackups. In most cases, the form of features in the chain of dimensions and tolerances has little or no effect on the result of the tolerance stackup, as a feature’s form tolerance is almost always smaller than its location tolerance. The tolerance stackup problem is idealized, and these tolerances are not included in the chain of dimensions and tolerances. Usually there is little risk in omitting form tolerances from the tolerance stackup.
