Egg Insulator, With Flip Prevention

The original egg insulator has a lot going for it. It puts the insulating material in compression, rather than in tension like the dogbone. This makes it much less likely to fail under load.

The original I started from is a pretty nice take on the idea. What I think could be better is to re-design the cavities so they are more suited to 3D printing, with things like giving the ceilings a flat top, so the printer can bridge them cleanly. This part prints without supports.

Another downside is that if the wire isn't tightly pressed tightly enough against the insulator there is the risk that it will flip end-for-end under load. I added rings to make sure that everything stays in place. The rings are only on one side, the side that is on the print bed. This is enough to ensure stability without having to add complicated supports at the top. 

I lifted all of the dimension ratios from the original part. Unfortunately I don't know enough about SCAD to build this model in it, so all I can provide is the finished mesh files. I made a 6 mm which seems like the right size for practical use. 

I printed it with a 0.6 nozzle in PLA. Pretty much anything should work. 

Please send me any requests for different sizes or other improvements.

Changed some features to improve printability.

Added rings to keep the insulator from flipping over under tension.