Gear and Pinion
thingiverse
Check out this awesome YouTube video at https://www.youtube.com/watch?v=6iXwvLGGXpQ, it's a must-see! And if you're interested in the gear holder part, I've got you covered - just visit http://www.thingiverse.com/thing:1653851 to see it for yourself!
Download Model from thingiverse
With this file you will be able to print Gear and Pinion with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Gear and Pinion.