Creating Geometrical Tolerances 

This task will show you how to create a geometrical tolerance annotation.
Before performing the task, here are a few principles you should be familiar with: 
Open the Annotations_Part_04.CATPart document.

  1. Activate the Front View.2 annotation plane.

  2. Click Geometrical Tolerance  in Annotations toolbar.

  1. Select the face as shown.

 		 This scenario illustrates the creation of a geometrical tolerance by selecting geometry, but you can also select any Part Design or Generative Shape Design feature in the specification tree. In this case, the created annotation will not be attached to the selected feature, but to its geometrical elements at the highest level.

If the active view is not valid, a message appears informing you that you cannot use the active view.
Therefore, the application is going to display the annotation in an annotation plane normal to the selected face.
For more information, see View/Annotation Planes.
 

  1. The Geometrical Tolerance dialog box appears.

    This dialog box allows you to:
    • Specify as many specification lines as you want (with the Up and Down arrows).
    • Insert several modifiers anywhere in a tolerance or a reference.
    • Add notes upper and lower the set of specification.

    The Tools Palette is displayed according to the type of face selected depending on the canonicity. In this scenario the Tools Palette is not used. For more information, refer to Propagating Geometry Selection for Feature Creation.
 

  1. Set the parallelism symbol to define the tolerance.

  1. Enter the value of the tolerance: 0.5 and insert the Least Material Condition symbol modifier.

  1. Enter A as reference.

  1. Specify the upper and lower notes.
Modifiers are not displaying in tolerance and reference fields and appear with a "|" character.
 

  1. Click OK to confirm the operation and close the dialog box.

    The geometrical tolerancing annotation is attached to the part.
The geometrical tolerance entity (identified as Geometrical Tolerance.xxx) is added to the specification tree in the Geometrical Tolerances group.