Internal Spherical Turning 25 August 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! Move the lathe carriage to set initial position: center of internal spherical surface of the work must lay on the axis of the revolution joint between the blue tool post and the green bar. Turn brown wheel to move red tool in circular trajectory. « previous mechanism Oval Gear next mechanism » Spherical R Mechanism load comments Please enable JavaScript to view the comments.