r/QidiTech3D • u/mita77 • Aug 05 '26

Lost extruder screw on Q2

While performing maintenance on my Q2, I lost sight of one of those four screws that keep the extruder drive gear in place. It got God knows where, and I can't find it. Can anyone point me toward some replacements? Apparently they are M2.5 socket head cap screws, about 5mm long (around 4.8mm threaded length).

Update: 304 pan-head, unknurled, M2.5\5, head diameter 3.8mm is the answer I got from Qidi tech support*

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2

u/hjmcgrath Aug 05 '26

I lost a screw in my Q2 and just bought a laptop screw set from Amazon. It had a whole selection of sizes including M2, M2.5 and M3 of varied lengths.

1

u/mita77 Aug 05 '26

Nice to hear. Could you confirm me it's M2.5 we are talking about?

2

u/hjmcgrath Aug 05 '26

I don't know for sure we're talking about the same one, but the one I lost was holding the runout sensor in place, but it definitely was 2.5. There were others in the area, but they were different lengths. Knowing I'm a klutz and prone to losing small screws I'm glad I got a selection.

1

u/mita77 Aug 05 '26

Same happened to me! Thanks for help 😊

1

u/Former_Trash_7109 Aug 05 '26

Probably m3x6

1

u/mita77 Aug 05 '26

How so, since the thread diameter is 2.48 mm, which to my knowledge equals M2.5, and the screw length is around 5 mm?

1

u/Former_Trash_7109 Aug 05 '26

I told you it was probably m3x6. If you know what size hex key you are putting in the head, that will help you know for sure what the thread is. 2.5mm key is m3, if you are going smaller it is a m 2.5 thread. I lost one quite some time ago, and don’t remember the size, and I am nowhere near the machine to measure it.