My new hot end design. It's not yet built, but I will try to make it in steel and brass as soon as possible!
I do not have any software for virtual heat tests, so there is no guarantee that it will work.
The hot end is designed to be easily manufactured in a manual lathe.
The plug on top is a drilled M8 threaded rod, the body will be made of carbon steel or aluminum, I don't know yet.
Edit1: changed the design to fit j-head nozzles from ebay