To create a belt/chain assembly feature:
- Click Belt/Chain
(Assembly toolbar) or .
- Set the PropertyManager options.
- Click
.In the FeatureManager design tree, the following appear:
If you selected
Create belt part, a new part containing the belt sketch is created and added to the
Belt 
folder in the assembly. The part has:
- An external reference to the assembly.
- A LockToSketchMate
that constrains the belt part to the belt sketch.
- Custom properties Belt Length and Belt Thickness.
If you selected Engage belt, you can drag to rotate one pulley to see all the pulleys rotate.
Video: Assembly Belt Engaged
If you did not select Engage belt, you can reposition one pulley without causing the others to rotate.
Video: Assembly Belt Disengaged