Archimedean Spiral Gear and Worm 17 November 2018, 19:30 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! Input: the spiral gear of 1 start. Output: the worm of 1 start. Transmission ratio: 1 The number of starts can be more « previous mechanism Shaft Rotation Limiter next mechanism » Part Orientation load comments Please enable JavaScript to view the comments.