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Creating Saddle Shutoff Surfaces

A saddle shutoff typically requires you to create multiple surfaces to achieve the desired shape.
• Create the surfaces.
• Perform surface manipulations.
• Merge the surfaces to create the final shutoff.

Creating Saddle Shutoff Surfaces 2
Figure 1 – Saddle Surface Created

Creating Saddle Shutoff Surfaces 1
Figure 2 – Face Surfaces Created

Creating Saddle Shutoff Surfaces 3

Figure 3 – Final Saddle Shutoff
Creating Saddle Shutoff Surfaces
To handle a saddle shutoff within the part, you must create the surfaces which represent the shutoff faces. A saddle shutoff is a bit more challenging than the parting line surface or a face shutoff because you generally need several surfaces to form the required shape. Typically, you create the saddle surface and then create the face surfaces.
You can extrude or revolve the surfaces, or use more advanced geometry creation methods like blended surfaces, depending on the desired geometry.
You can even copy existing surfaces and paste them. You can then manipulate these surfaces by extending, trimming, and offsetting them if
needed. Once the saddle surface and face surfaces have been created, you must merge the surfaces together to form the required shape.


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