Creating Pads or Pockets from Surfaces

This task explains how to extrude surfaces in any direction. The scenario below shows you how to create a pad, but the method and options described are also valid for creating pockets.
Open the ThickSurface.CATPart document.
  1. Select Extrude.1 as the surface to be extruded.
    The different surfaces you can select are:

    • surfaces created in the Generative Shape Design workbench
    • CATIA Version 4 surfaces
    • non-planar faces.
  2. Click Pad .
    The Pad Definition dialog box appears. You need to define an extrusion direction. To do so, either you select a geometric element or set the Up to Plane limit and select the plane of your choice. In that case, the direction will be given by the normal to that plane (for more, see pockets).

  3. Click the Reference field and select Plane.1 as the plane defining the extrusion direction.
    The direction is the normal to the plane.

Make sure that the surface to be extruded is not tangent to the extrusion direction nor to the plane.

For both limits to be defined, you can use all the options described in the tasks showing the pad creation:

  1. Enter 21mm and 11mm as the first and second limit values respectively.

  2. Click OK to confirm.
    The new element identified as Pad.XXX is added to the specification tree.

Non-planar faces

If you create a pad or a pocket from a non-planar face, that face is displayed as a datum in the specification tree.



In the following example, two different types of limits are defined for trimming the material extruded then removed from each side of the surface.


Initial part




The option used to define the first limit LIM 1 is Up to plane (the white arrow points to the selected plane). The extrusion direction is then defined by this plane.

LIM2 is defined by a dimension type limit.




Material has been removed from each side of the surface.



The options for creating thin solids are not available when you select a surface as the element to be extruded.