Tolerances define the manufacturing limits for dimensions. All dimensions have tolerances either written directly on the drawing as part of the dimension or implied by a predefined set of standard tolerances that apply to any dimension that does not have a stated tolerance.
This chapter explains general tolerance conventions and how they are applied by using AutoCAD. It includes a sample tolerance study and an explanation of standard fits and surface finishes.
Chapter 10 explains geometric tolerances.
There are two methods used to include tolerances as part of a dimension: plus and minus, and limits. Plus and minus tolerances can be expressed in either bilateral or unilateral ...