2004

Add Geometric Tolerances | 557
Add Geometric Tolerances
You can add geometric tolerances show acceptable deviations of form,
profile, orientation, location, and runout of a feature.
Overview of Geometric Tolerances
Geometric tolerances show acceptable deviations of form, profile, orienta-
tion, location, and runout of a feature. You add geometric tolerances in
feature control frames. These frames contain all the tolerance information
for a single dimension. Geometric tolerances can be created with or without
leader lines, depending on whether you create them with
TOLERANCE or
LEADER.
A feature control frame consists of two or more components. The first feature
control frame contains a symbol that represents the geometric characteristic
to which a tolerance is being applied, for example, location, profile, form,
orientation, or runout. Form tolerances control straightness, flatness,
circularity and cylindricity; profiles control line and surface. In the illustra-
tion, the characteristic is position.
You can use most editing commands to change feature control frames, and
you can snap to them using the object snap modes. You can also edit them
with grips.
Note Unlike dimensions and leaders, geometric tolerances cannot be associ-
ated with geometric objects.
optional diameter symbol
tolerance value
geometric characteristic
symbol—in this case,
position
primary, secondary, and tertiary datum reference letters
material conditions of datums
material conditions of tolerance