Gears.
thingiverse
I'm Printing My First Thing Ever On My Printer - A Gears Model That Could Be Either a Game or an Educational Tool. To Get Started, I Highly Recommend Lubricating the M4 Threads With Silicone Oil Before Making the First Cut Using a Steel Nut and Screw.
Download Model from thingiverse
With this file you will be able to print Gears. 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 Gears..