This is my design for a magnetic hotend assembly for the Flying Bear Tornado 3d printer.
Being a cheap kit as it is, the stock hotend on the Tornado is pretty junky. I tossed that before even plugging it in and got to the busy work of desinging my own.
I've had a number of 3d printers, and expierence has taught me that easy access to the hotend is important. I've had a few frustrating times with a few different printers, where I had to dissassemble a little more than I'd like, than should be needed, just to service the hotend. The design of this is geared towards tackling that problem, to an aggressive extent. Not only is it an open design for easy access and viewing, but the magnetic base makes it even easier since you can remove the whole assembly and work on it away from the printer altogether.
The magnetic base also adds the advantage of being able to easily swap the hotend assembly. I do plan to make a Volcano variant, and a Chimera variant. In particular, I could see being able to swap in a volcano as being useful.
This design also adds a part cooling fan, and moves the X endstop from the side of the H-carriage onto the hotend assembly, like it usually is with normal printers. There's a screw on endstop bump included, for putting on the frame where the endstop originally went.
The magnets are round disc magnets, sized 10x2mm. The magnets should be press fit (They were for me) The fan for the hotend heatsink is a 40x40mm, and the turbo blower is a 50x50x15mm.