Keeping Direction Unchanged During Rotation 24 May 2018, 18:00 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 direction of the red object is unchanged. Using spur gears. The end gears have the same number of teeth. « previous mechanism Friction Cone Roller Drive next mechanism » Quick Clamp for Cable load comments Please enable JavaScript to view the comments.