Gear / Pinion
thingiverse
This design isn't mine, it's actually from a website called igus-cad.com. You can easily customize every aspect of the pinion, making it pointless for me to share my own version.
Download Model from thingiverse
With this file you will be able to print Gear / 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 / Pinion.