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UM3 Hard Core from 3D solex

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Posted · UM3 Hard Core from 3D solex

Hi everymaker,

I open this topic to share my experience with the 3D Solex Hard Core.

I wanted to print abarasive filament ( like carbon, copper, brass, sandstone.......) with my UM3 but first of all the original core is 0.4mm and must of them will stuck in the nozzle, and second, it would ruined my nozzle in a few spool......

The other issue is to print wood filament, I tried with the original core, sometimes it works and sometimes the nozzle cog at any stage of the print.

After research on the web I found this Norway Company: http://3dsolex.com/

They offer print core for UM2 and UM3, with interchangeable nozzle wich is a great advantage especially for UM3.

I bought one of them last week, I choose the version with 7 nozzles:

0.25mm coated brass for high details x1

0.4mm coated brass with "Ice" coating x2 (can be use with abrasive)

0.5mm steel Ice x1 (can be use with abrasive, need to low the print speed by 2/3)

0.6mm Coated brass x1 (I use it with wood filament or for faster print)

0.8mm coated brass x1 for fast print

1.0mm coated brass x1 for fast print

After tchating with Carl from 3D Solex (thanks to his patience !), I decide to had a 0.5mm Everlast nozzle to my order

This nozzle is much more resistant to abrasive and the most important, you do not need to reduce your print speed as it is not in steel.

So far I've been testing 0.4mm with PLA and ABS, the result is very smooth, the core is working perfectly and communicate correctly with the UM3.

I'v been testing the 0.6mm with Coconut filament from Formfutura, no more coging ! the result is very nice, see picture of Groot.


I've been ordering copper and brass filament from Formfutura and will upload photo and comment about them next week.

I found that this core is a "must have" for UM3 owner.


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