Friction Ratchet Mechanism 29 December 2016, 22:00 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! The yellow cam plays pawl’s role. The friction force between the yellow cam and the green no-teeth wheel drives the latter. No noise and backlash in comparison with ordinary ratchet mechanisms « previous mechanism Copying Device on Lathe next mechanism » Bar Linkage for Output Rotation load comments Please enable JavaScript to view the comments.