Fillet Radius Tool

The Fillet Radius tool is used to round off features on a part; these can be internal or external edges. There are a number of reasons why this might be done.

Internal edges are rounded to:


External edges are rounded to:

The fillet tool in CATIA is very simple to use; however, some issues can sometimes occur if it is not used correctly.

The Fillet Radius tool can be found in the ‘Dress-Up Features’ toolbar, as shown below:

Once clicked, select the edges to which you want to apply a fillet. To select multiple edges remember to use the control key simultaneously with the left click. From the dialogue box, choose a radius:
(Make sure the parameter is set to “tangency”. Other options can be used for more complex applications.)

Click OK when done: