How to build a Slip Gear?

Hi! My name is Anthony Green and I am from Oxford, AL Oxford High School. We are trying to build a slip gear for our robot for the 2016 VEX StarStruck competition. If anyone has any detailed instructed or a very useful video of how to build a slip gear. Pleas add link below or email me at We really would like the help. Thank you!

Google using the site constraint is very helpful. Type the following in and you will get results just from the forum here. slip gear

Here is one of the handy results…

Adding in grind teeth and this one pops up