Section Views

Introduction Section views are used to show internal features of parts that can’t easily be seen on multiview drawings. Section views reveal internal details by displaying the part as if cut by an imaginary cutting plane. It helps the drawing be more understandable, especially when showing internal features or in assembly drawings.

Section Drawing Types Full section view Half section view Offset section view Broken-out section Revolved section view

Full Section View This view is made by passing an imaginary cutting plane through the full length of an object. It is the most common type of section view used.

Half Section View Half sections show the interior of an object where the cutting plane has penetrated only half way through the object. They are mostly used in applications where cylindrical parts are described.

Offset Section View It has one or more bends at 90˚ in order to pass through as many features as possible. They are usually used for complex parts with more than one important feature. Offset sections use a cutting plane that to pick up valuable features of the part.

Broken-out Section & Revolved Section Broken-out section views are used to show only a portion of the view as sectioned. Revolved section views are used to show diverse shapes that may appear in a part. A jagged break line may be used to divide the revolved section from the rest of the drawing.

The Cutting Plane It’s an imaginary plane that shows where an object was cut to obtain a section view. Shows the line of sight so a proper section view can be drawn. Drawn with the PHANTOM line type

Cutting Planes Lines Arrows at the end of the cutting plane line indicate the direction of view for the sectioned drawing. They point toward the part that is seen in the section drawing. Cutting plane lines are occasionally not shown when their location is obvious.

Section Lines/Hatching These are hatching patterns that are used to represent different types of materials. Hatching should not run parallel or perpendicular to a major feature. If there is a need to show dimensions or add a note within the hatched area, do so by leaving “white space” in the center of the hatch area.

Section Line: Hatching