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Advanced modeling · Lesson 1: Advanced fillets

Constant radius fillet options, variable or zero radius, setback fillets and face fillets.

Lesson goal

Choose the fillet type and options that give a clean blend where a simple fillet fails.

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4 videos

✎

1 exercise

Intermediate

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Prerequisite: Modeling basics learning path

1. Watch the videos

Dassault Systèmes videos hosted on MySolidWorks: they open in a new tab and a free account is enough. Watch them in order.

Constant Radius Fillet OptionsVideo 1▶Constant Radius Fillet OptionsKeep or remove features, overflow type and round corners.↗ Variable and Zero Radius FilletsVideo 2▶Variable and Zero Radius FilletsVary the radius along an edge and make it converge to a point.↗ Setback FilletsVideo 3▶Setback FilletsCleaner blends at vertices where three or more edges meet.↗ Face FilletsVideo 4▶Face FilletsA fillet defined by faces, useful on imported geometry, with curvature continuity.↗

2. Key takeaways

1

The overflow type controls how a fillet behaves when it is larger than the available space.

2

A variable radius is driven by values at vertices and control points; a zero radius makes the fillet converge to a point.

3

Setbacks spread the blend over the edges that meet at the vertex: the corner is smoother.

4

A face fillet is based on faces, not on an edge: it works even on an imported model with no history.

Tip

When a fillet fails, first try splitting it into several features in a different order before changing the type.

3. Do the exercise

On an 80 × 80 × 40 mm block:

  • add a variable radius fillet from 5 to 15 mm on a vertical edge
  • blend a corner where three edges meet using setback values
  • replace a standard fillet with a curvature continuous face fillet
✓To check: The zebra stripes flow without breaking across the face fillet, and the setback corner shows no pinching.

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