Creality K1 Nozzle tool

Brass nozzles wear out and have to be replaced. If one is cheap, one can try to fix used nozzles so that they can be used a bit longer. One can not correct all problems, but it is possible to use this 3D-printed jig to flatten the front and rear of the nozzles.
If done properly the results should be better than factory standard.

I made a jig that fits the volcano nozzles that Creality uses in a few of their printers.
The original volano nozzles are a bit wider at the front. I do not have any of these, so someone else can adapt the model (I have appended the FreeCAD model).

Print the jig in PLA. This material is hard and tough, which is perfect for anything that will be riding on top of a grinding surface.

Please note that the jig is very tight. This is on purpose. The nozzle needs to sit tight for a perfect end result. The idea is to use something that will not damage the nozzle to ram it into the jig. I use a piece of wood. I then use a chopstick to ram it back out. This cr