[Al Skierkiewicz]

4.1.2 Safety & Damage Prevention
[R08]
Robot parts shall not be made from hazardous materials, be unsafe, cause an unsafe condition, or interfere with the
operation of other Robots.

If the chains are inside a drive mechanism and not generally able to allow fingers to enter you are OK. If the chain is exposed and near where a person's hands or other body parts may be pulled in, the chain should be covered or protected. This is true of shooter motors as well since they are likely to be still moving at the end of a match where field resetters and refs will be moving near and about your robot.