Introduction
An interactive 3D model of a many common gear types.
The types of gear shown are:
- Sprocket
 - Face Gear
 - Planetary Gear
 - Rack and Pinion
 - Worm Gear
 - Bevel Gear
 - Spiral Bevel Gear
 - Herringbone Gear
 - Helical Gear
 - Spur Gear
 
Additional Resources
https://khkgears.net/new/gear_knowledge/introduction_to_gears/types_of_gears.html
https://www.thomasnet.com/articles/machinery-tools-supplies/understanding-gears
http://www.jnkvv.org/PDF/13042020223836gear%20sent%20word.pdf