Is a ʼRevolvedʼ feature faster to calculate than multiple extrusions in SolidWorks?
Short Answer
Yes — in many SolidWorks parts, a single Revolved Boss/Base is faster to calculate than several separate extrusions because it creates the shape with one feature and a simpler feature tree. This is the most common professional method for axisymmetric geometry. However, the gain is small if the model is already very simple.
What You Need to Know Before
Warning: A revolve can fail or rebuild slowly if the sketch crosses the centerline, contains thin sliver geometry, or uses too many chained contours. A “faster” feature also becomes a liability if later design changes require non-rotational edits that are easier with separate extrusions.
How to Do It in SolidWorks
Command: Revolved Boss/Base
Shortcut: No default keyboard shortcut
Quick Steps:
- Create a 2D sketch on a plane, then draw the profile and a construction centerline for the axis in the FeatureManager or CommandManager Sketch tab.
- Go to Features > Revolved Boss/Base in the CommandManager Ribbon and select the sketch region plus the axis of revolution.
- Set the Angle value, keep Merge result enabled if this should remain one solid body, then confirm the feature.
Variables & Settings
Key Setting: Merge result
- Expert Setting: When enabled, SolidWorks combines the revolve with touching solid geometry into one body, which usually keeps the feature tree cleaner and rebuild logic simpler. Turn it off only when you intentionally need multibody workflows.
Why it Fails
- Cause 1 (Geometry): The sketch profile intersects the axis of revolution or creates self-intersecting geometry during the 360° turn.
- Cause 2 (layers/Locks): The sketch or reference axis is underdefined, suppressed, or tied to external references that are missing, causing rebuild instability.
- Cause 3 (Command/Logic): Multiple extrusions may outperform a revolve in practice when the shape is not truly axisymmetric and later cuts, drafts, or design table changes force extra workaround features.
Quick Fix & Best Practice
- Quick Fix: Edit the sketch and make the revolve profile a single clean closed contour that does not cross the centerline, then rebuild with Merge result checked.
- Manager’s Verdict: Use Revolved Boss/Base for shafts, bushings, turned parts, and any rotational form. Avoid forcing a revolve when the part will need many asymmetric edits later; a few logical extrusions may be more maintainable.
FAQ
Is one revolve always faster than multiple extrusions?
No, but it is often faster and cleaner for rotational geometry.
Does a revolve reduce feature tree complexity in SolidWorks?
Yes, one revolve usually replaces several boss extrudes.
Should I use revolve for non-symmetrical parts?
No, use it mainly for axisymmetric shapes.
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