Available in: Sketch

Create fillets or rounds with a specified radius along one or more lines, arcs, or splines.

Shortcut: Shift+f

The Fillet sketch tool creates fillets or rounds with a specified radius along one or more lines, arcs, and splines.

First, select the fillet tool from the sketch toolbar, then click on a point. This creates the radius for the fillet. Next, enter a precise dimension using your keyboard. Press the Enter key to create the fillet. Then move the dimension to a different location to see the dimension more easily.

You can also create a fillet by clicking and dragging the point outward until you see the radius you want, and then let go. Enter a more precise measurement using your keyboard. Press the Enter key to create the fillet.

Another method is to select the Fillet sketch tool and then two lines. This also creates a radius for the fillet. Press Enter, put in your new dimension, and press Enter again to create the fillet.

  1. Click Sketch fillet tool icon or press Shift+f.
  2. Select a point or two sketch curves.

    Example of selecting a point or two curves

  3. The radius dialog opens, click in the dialog and enter the radius.

Line, make selections

  1. Click first line; no highlighting occurs.
  2. Click and drag second line to estimate size of fillet.
  3. Enter value for fillet radius and press Enter.

Line, make selections example

Vertex, make selections

  1. Click Sketch Fillet icon.
  2. Click a vertex.
  3. Enter the radius value and press Enter.
  4. Each subsequent click with the Fillet tool selected results in equal-sized fillets.

    Vertex, make selections example

Spline, make selections

  1. Click the Sketch Fillet icon.
  2. Click the left spline near the top (not the point).
  3. Click the right spline near the top (not the point).
  4. Enter the fillet radius value and press Enter.



    Spline, make selections example

You may notice a small, open circle after the fillet is applied, where the lines used to meet. This is a virtual sharp that is added to the sketch as reference geometry. This virtual sharp will retain the coincident constraints on the two lines, as well as a dimension (radius of the fillet). You may want to use this as a reference point for adding constraints, for example. You may also choose to simply ignore it. (See the "Vertex, make selections" example above to see the virtual sharp.)

  • To apply more than one fillet of the same size, make the first selection, enter the radius, then click the other points to fillet. The first value entered becomes the default and that size fillet will be applied to all selected points. You are able to change the first value to change all values.

    Example of applying more than one fillet of the same size

    If the default fillet size is too large for a selected point, the fillet line is displayed in red.

    Example showing the default fillet size too large for a point, displayed in red

    You are able to drag the manipulator to resize the fillet.

    Example dragging the manipulator to resize the fillet

    You are also able to click to activate the value and enter a new value for the fillet size:

    Example of clicking on the fillet to activate the value and resize it numerically