moving gears
thingiverse
This is a box with two moving interlocked gears on top the idea is to print this in one go such that the gears are permanently locked inside the model and move freely
Download Model from thingiverse
With this file you will be able to print moving 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 moving gears.