Altering Speed With Oldham Mechanism 30 January 2017, 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! If the red shaft is driving, the green shaft speed is half of the red shalf one.is used for this case. « previous mechanism Oval Gear next mechanism » Universal Joint of Links load comments Please enable JavaScript to view the comments.