A revolved section is a way to show the cross-sectional shape of a feature—such as a spoke, handle, or rib—by sketching its profile directly onto the object’s regular view. Instead of creating a separate section view, an imaginary cutting plane is passed perpendicular to the long axis of the feature, and the shape that would be revealed by the cut is rotated (or “revolved”) outward and drawn in place, right on the feature itself.
The result is a compact and efficient way to show what the internal profile looks like without cluttering the drawing with extra views. The cross section is usually drawn with hatching to indicate solid material, and it’s often aligned with the centerline of the feature. Because it sits right on the object in its true location, the revolved section gives a clear and immediate understanding of the part’s shape while keeping the drawing concise.
Revolved sections are especially useful for long, uniform parts or features that repeat along their length, where a full or half section might be unnecessary. They provide essential geometric detail without interrupting the flow of the main drawing.