Crispy HotEnd
Contents
A Bit of Background
This HotEnd was developed after struggling with the fact that in Argentina (were I live) PEEK is very hard to come by, very expensive and a controlled material (since it can be used to manufacture guns).
Therefore, I went and designed a PEEK-free HotEnd.
Since PTFE is available and fairly cheap, I started to work on building a HotEnd based on that insulation.
PTFE is easy to work with, threads don't last much and are quite fragile, to solve this I went on and designed a "contained" PTFE insulation.
I took some ideas from the Budaschnozzle (which I tried, unsuccessfully, to build replacing PEEK with PTFE)
I'm a Hobbyist Lathe operator, so a lot is done on my lathe. That's a lot of help and makes this cheap.
I Hope some people out there find it useful.
Gustavo "Crispy" Blanco
The Crispy HotEnd
The HotEnd Disassembled
BOM (Build of Materials)
The Built
Tipically I star with the Barrel.
It's a 50mm 12mm Aluminum round bar which it turn to 8mm in diameter for 45mm, and make those 45 mm a 8x1.25 Thread.
Next, I take a piece of 1" (or 25mm) Aluminum Pipe and cut a 25mm long section. On the Lathe and with a piece o 25mm PTFE, turn it so you can fill the pipe (try to get it tight). With a 6.75mm Drill bit, drill the PTFE (at least 30mm deep). Then with a 12mm Drill bit, drill 18mm into the PTFE
Now take the 12mm PTFE and brill a 3.2 hole, drill it all the way.
Now, insert the Barrel into the large PTFE section, using the largest hole, and screw it tight.
And the small PTFE to enclose the barrel