3D Printing: Stainless tip for thermistor (3 Solutions!)
Channel: Roel Van de Paar
Date: 2019-06-26

3D Printing: Stainless tip for thermistor


The Question: I would like to secure my hotend thermistor in a more reliable way (now it is
just thermistor plugged in the hotend :D). I want to have a stainless steel tip
for it to fix it inside hotend with a screw (The same approach as used for the
heating cartridge). I have thermistors, but I cannot find any tips to buy
separately.
Maybe you have some links for this kind of stainless-steel tips? Or some
keywords I can use to search them?

Solutions: Please watch the whole video to see all solutions, in order of how many people found them helpful

== This solution helped 3 people ==
I am not too sure what you're searching for, but I imagine it to be a kind of
thermistor housing to distribute pressure from the screw while maintaining good
heat conductance.
I first have to say that I'd be afraid to damage the glass droplet of the
typical thermistor design by putting pressure to them, especially including
later thermal expansion. However, I never tried and we might find some valuable
experience on that in other answers here.
If what I assumed in the first paragraph is true, I would suggest forming some
housing yourself with copper foil or copper sheets, since the heat conductance
of copper is good and it is more or less soft.
However, as a more simple solution, you might just cut the metal part of a
'wire ferrule', if you got some lying around. (Wikipedia has no english article
for this, so I link the german one for the images: Aderendhulse)
Additional info: Can't you clamp the thermistor the way it is done in the E3D
V6 hotend, see raw.githubusercontent.com/3DModularSystems/Scalar/
master/Documentation/Photos/Head/E3D%20V6/Head%20-%20012%20-
%20ThermistorBent.jpg?
[Thermistor_in_E3D_V6_hotend]
Thermal contact should be quite good and you don't have any problems which
could lead to damage of the thermistor.

== This solution helped 3 people ==
My thermistors came with a small spring surrounding them, which seems to work
pretty well for this (see also 3dprinting.stackexchange.com/questions/
293). It's pretty close to the size of the spring in an ordinary pen, so you
could just try one of those, or you could wind one from copper wire. I always
use thermal grease as well, just like you'd use for heat sinks.
cdn.shopify.com/s/files/1/1377/6475/products/
Thermistor_Wired_Black_grande.jpg from B3_Innovations_-_Thermistors_(Gen1)
[Thermistors_(Gen1)]

With thanks & praise to God, and with thanks to the many people who have made this project possible! | Content (except music & images) licensed under cc by-sa 3.0 | Music: www.bensound.com/royalty-free-music | Images: stocksnap.io/license & others | With thanks to user TextGeek (askubuntu.com/users/40), user Ryan Carlyle (askubuntu.com/users/298), user kamuro (askubuntu.com/users/168), user Greenonline (askubuntu.com/users/4762), user Anton Osadchy (askubuntu.com/users/787), and the Stack Exchange Network (3dprinting.stackexchange.com/questions/696). Trademarks are property of their respective owners. Disclaimer: All information is provided "AS IS" without warranty of any kind. You are responsible for your own actions. Please contact me if anything is amiss at Roel D.OT VandePaar A.T gmail.com.