Select the profile to be extruded, that is the circle.
2.
Click the Pad icon .
The
Pad Definition dialog box appears and CATIA
previews a pad with 10 mm as the default dimension value.
3.
Click the arrow in the geometry area to reverse the extrusion direction (or click the
Reverse Direction button).
4.
In the Type field, set the option to
'Up to last'.
The last face encountered by the extrusion is going to
limit the pad.
Optionally, click Preview to see the
result.
5.
Click OK.
The pad is created. The specification tree indicates this
creation.
By default, CATIA extrudes normal to
the plane used to create the profile. To see how to change the direction, refer to Pad not Normal to Sketch Plane.