Cable Drive 05 July 2017, 19:00 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! W: weight of the load P: pulling force for moving up the load. Mechanical advantage: 4 « previous mechanism Keeping Direction Unchanged During Motion next mechanism » Study of Worm-Worm Drive load comments Please enable JavaScript to view the comments.