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Is the Prusa Mini Hotend and All Metall Hotend?  

Eric Eichstaedt
Eminent Member
Is the Prusa Mini Hotend and All Metall Hotend?


I was wondering if you can assume that the standard Hotend of the Prusa Mini is an All-Metall Hotend because the PTFE doesn't go all the way down to the nozzle.
Are there any other properties so that you can call a Hotend an All-Metall Hotend?



Electrical EngineerWorking on master’s degree in electrical engineering...
Posted : 31/07/2021 12:01 pm
PTFE Through heatbreak to rear of nozzle is not all metal

Hi Eric
If I recall correctly the section of the hot end from the bottom of the heatbreak upwards is PTFE Lined (Inside the melt zone),

Only the nozzle is totally metal. this is not an all metal hot end.  

I believe the Bondtech Heatbreak upgrade,  provides a new heatbreak where the entire length of the melt zone is metal

this would make the bondtech mini hotend upgrade into an all metal hotend. 

Other revised heatbreak options may exist. 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 31/07/2021 2:04 pm
New Member
Not even the Bondtech heatbreak is all metal

I have the Bondtech heatbreak and while it may provide other benefits, it does not make the hot-end all-metal. There is still a PTFE tube inside.

Posted : 31/07/2021 9:56 pm
Eric Eichstaedt
Eminent Member
Topic starter answered:
Depends on the definition of All-Metall-Hotend

First, thanks for your answers.
I also upgraded to the Bondtech heatbreak and I thought the original Heatbreak was similar when it comes to the position of the PTFE Tube.

All-Metall means to me that there is no PTFE Tube in the melting zone and not no PTFE at all.

Electrical EngineerWorking on master’s degree in electrical engineering...
Posted : 01/08/2021 4:06 pm
Reputable Member

Bondtech heatbreak might look similar only at first sight. In functionality however, it's totally different:
1st -temperature wise, it actually decouples hotend and coldend (original heatbreak doesn't),
2nd -TPFE is located only inside coldent (in original heatbreak, PTFE goes all the way to heatblock).
In that sense, I don't care if it's "declared" as all-metal or not.

I highly recommend watching this video (explanation 5m:30s).

Mini+ with Bondtech upgrade & modified firmware...
Posted : 01/08/2021 5:59 pm