This is a wicked fast way to create spur gears using pencils. Making gears can be frustrating for many people. This method creates reliable gears that do not bind. It takes advantage of the hexagonal profile of a pencil to create a forgiving pitch and pressure line.
These gears are suitable for learning the basics of gears. It is not intended to be a high precision or strength substitute. It is, however, a great way to slap together simple prototypes, build a spirograph, hobo clock, or crane.
Step 1: Materials and Tools
Dremel or equivelant high RPM cutting tool
Two permanent markers of differing colors
Hot Glue Gun
Paper printout of attached Visio
Box of pencils. For each 32 tooth spur gear, plan on using about 4 pencils. I used #2 pencils from the dollar store.
2 Liter Plastic Bottle Cap