August 30, 2007
300mm Dome - The Rings
If the force is what gives a Jedi his strength, then the inner ring of the 300mm dome would be R2's "force." This 3/4" thick HDPE internal ring makes all the difference in fitting the dual layer dome together. Here is a picture of this ring as it sits on the Rockler bearing and the turned aluminum ring.
When you get your dome, the plastic ring is already pre-cut and the hardware included. All you need to provide is the bearing to get what you see here. There are more screws to fully attach the bearing and the plastic ring that I don't have in this picture too. Eventually, the dome is placed on top of the HDPE ring and the whole thing spins.