Gear (Rack and Pinion): https://youtu.be/hVuJGtUuzBc
Different joints in Assembly wb: https://youtu.be/X13cdbPhodI
Gear Basics: https://fab.cba.mit.edu/classes/863.09/people/cranor/How_to_Make_(Almost)_Anything/David_Cranor/Entries/2009/10/12_Entry_1_files/module.pdf
Gear Ratio: https://evolventdesign.com/pages/gear-ratio-calculator