When constructing a base feature using the Revolved Protrusion command, you must use a closed profile. When adding a revolved feature to a model, you can use open or closed profiles.

When drawing the profile for a revolved feature, you also must define an axis of revolution. Each revolved feature can have only one revolution axis defined. You can select a profile line or a reference plane using the Axis of Revolution command on the Home tab in the Draw group. The revolution axis is displayed using a dashed line style.

When using an open profile to construct a revolved protrusion (A) or cutout (B), the Side step allows you to define which side the material will be added to (A) or removed from (B).

The Extent Step allows you to specify how many degrees you want to revolve the feature. You can type a value in the Angle box (A) or you can click the Revolve 360 button (B) to automatically revolve the profile 360 degrees.

When constructing revolved protrusions (A) and cutouts (B) which have extent values that are less than 360 degrees, you can use the Symmetric Extent or Non-Symmetric Extent button to apply the extent value to both sides of the profile plane.