Remove Surface Fillets
Use the Defeature: Fillets tool to find and remove both round (convex) and fillet (concave) surfaces.
The Defeature: Fillets tool allows you to select a round or fillet, and find all that are larger, smaller, or similar (±5%) in size. In general, it is best to remove small fillets first, then larger fillets, then rounds. When you get to a point where you cannot remove any more, it is time to use other modeling tools and strategies to complete the geometry simplification.
-
From the Geometry ribbon, click the tool.
Figure 1. 
- From the guide bar drop-down menu, select whether to find Rounds, Fillets, or All.
- Optional:
On the guide bar, click
to define settings used to
find and select rounds/fillets of a specific size.
Note: You can select the Process fillet chains checkbox to select only a portion of the fillet chain and defeature, if possible. -
Click Find on the guide bar.
Rounds and fillets in the model are selected and highlighted red.
-
Review each selected round/fillet by clicking
and 
on the guide bar.
- Optional:
Select lines that a fillet should ignore.
Figure 2. 
- Optional:
Select lines which make up the end of a fillet.
Figure 3. 
-
Remove rounds/fillets in the following ways:
- Remove all selected rounds/fillets by clicking Remove All on the guide bar.
- Remove individual rounds/fillets by left-clicking on a selected round/fillet.