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When building extruders, make sure you properly tighten the grub screw to attach your gear to the motor shaft. If it's loose, it'll gradually work itself free, and then your extruder will jam.

Ask me how I know.

#3DPrinting

@3dprinting

@koz @3dprinting

While you're at it, it's a good idea to put a drop of NON-PERMANENT threadlock in the hole before putting the grub/set screw in. Set screws suck no matter what.

Get "medium" strength , or it's not coming back out without the help of a , which tends to affect the life of the plastic components...

@cazabon @3dprinting I'm not sure if I have medium-strength threadlock. I have some Gorilla threadlocker adhesive: mitre10.co.nz/shop/thread-lock Would that do?

@koz @3dprinting

I'm not familiar with Gorilla's - I use , but and other brands are all similar, but I don't think that one is what you want. Red generally means the permanent stuff, and the fact that the packaging says "heat resistant" points in that direction too.

So if you use that one, it's probably never coming loose. That may not be a good thing :)

Medium-strength is generally blue, but Loctite uses red with a blue stripe on the package...

@cazabon @3dprinting The main reason I went for this one is because Loctite famously shouldn't be anywhere near ABS, and my original use case was for some heatset inserts that were replacing nylock nuts.

Since it's all I had, I decided to go ahead with it. Basically, two possibilities here:

1. It doesn't come loose anymore, in which case, problem solved.
2. It comes loose anyway, in which case I think I have bigger problems.

C.

@koz @3dprinting

Interesting. Reading between the lines, you printed extruder parts from ABS - my extruders have only been and , no other . I'm curious why the Gorilla stuff would be better suited to ABS than Loctite or others? Gorilla's red still seems to be methacrylate-based, like the others.

And , yes "extruder" is too a word.

Edit: typo fix.

@cazabon @3dprinting The case I was referring to was different: it's also a printer part, but not an extruder.

I have it on good authority that Loctite weakens ABS, whereas this specific Gorilla stuff is rated for use _with_ ABS. I even called one of their technical reps to ask, and they told me it was fine. The reason I was concerned was because the heatset was embedded into ABS, so any weakening there could be rather bad.

@koz @3dprinting

Ah. I'm interested to hear how it goes. Always room for another bottle of threadlocker on the shelf 😜

@cazabon @3dprinting So far, I can't test it, because I decided to concurrently cable chain the Mini, and discovered that the Z and X chains have to be done at the same time. Will definitely post about it, one way or the other.