CVT
thingiverse
This is a straightforward Constantly Variable Automatic Transmission that demands a rubber band stretched between the two triangles, which will seamlessly shift up and down to continuously alter the gear ratios. I plan to incorporate this setup into my RC race car, pending its successful functionality.
Download Model from thingiverse
With this file you will be able to print CVT 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 CVT.