Barrel Cam and Helical Gears 31 December 2016, 13:00 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! Input: green gear shaft of barrel cam. It rotates and linearly reciprocates simultaneously. Output: pink shaft that rotates irregularly. The irregularity depends on helix angles of the helical gears and cam profile. « previous mechanism Drive for Coaxial Propellers next mechanism » Ratchet Mechanism load comments Please enable JavaScript to view the comments.