729 ; 1 spur gear box
thingiverse
if my math was correct this is a 729 ; 1 gear box printed in pla + I suggest print at 200% scale as the base shafts are very weak each gear is a 3 ; 1 ratio with 36 teeth on the larger and 12 on the smaller please post pictures of your makes and please modify
Download Model from thingiverse
With this file you will be able to print 729 ; 1 spur gear box 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 729 ; 1 spur gear box.