Worm gear reducer 30:1

Worm gear reducer made to test the torque increase and resistance of the printed pieces.

It is difficult to render a good worm, see comments of worstruder http://www.thingiverse.com/thing:28126 and the shoulder for inmoov http://www.thingiverse.com/thing:40040

Whatch it lifting a 1'5 liter water bottle with a modified 83.0 oz-in (5.98 kg-cm) servo: http://youtu.be/bjJArhG0uGE

If you are a curious maker / "tinker" / hacker, have a look at my blog:
http://www.therandomlab.com