Geometric tolerances show acceptable deviations of form, profile, orientation, 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 illustration, 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.

You can also create annotative tolerances. For more information about creating and working with an annotative tolerances, see Create Annotative Dimensions and Tolerances.

Procedure

To create geometric tolerances

1. Click Annotate tabDimensions panelTolerance. At the Command prompt, enter tolerance.
2. In the Geometric Tolerance dialog box, click the first square under Sym and select a symbol to insert.
3. Under Tolerance 1, click the first black box to insert a diameter symbol.
4. In the Text box, enter the first tolerance value.
5. To add a material condition (optional), click the second black box and click a symbol in the Material Conditions dialog box to insert it.
6. In the Geometric Tolerance dialog box, add a second tolerance value (optional) in the same way as the first tolerance value.
7. Under Datum 1, Datum 2, Datum 3, enter the datum reference letter.
8. Click the black box to insert a material condition symbol for each datum reference.
9. In the Height box, enter a height.
10. Click the Projected Tolerance Zone box to insert the symbol.
11. In the Datum Identifier box, add a datum value.
12. Click OK.
13. In the drawing, specify a location for the feature control frame.

To create a geometric tolerance with a leader

1. At the Command prompt, enter leader.
2. Specify the start point of the leader.
3. Specify the second point of the leader.
4. Press Enter twice to display the Annotation options.
5. Enter t (Tolerance), and create a feature control frame.

   The feature control frame is attached to the endpoint of the leader.

Quick Reference

Commands

LEADER

Creates a line that connects annotation to a feature.

TOLERANCE

Creates geometric tolerances contained in a feature control frame.