Thumb screws vibrating loose on Core One - General discussion, announcements and releases

RE: Thumb screws vibrating loose on Core One

cwbullet — Tue, 05 May 2026 10:41:24 +0000

Interesting idea - thanks for the suggestion.

Posted by: @robin_13
I wonder if you put a small "O" ring under the head, it may work like a lock washer due to the friction. I have seen similar things done with other equipment.

RE: Thumb screws vibrating loose on Core One

cwbullet — Tue, 05 May 2026 10:40:33 +0000

I have added this to my checklist also.

Posted by: @geoff-steele
I do swap nozzles somewhat frequently and a while back noticed the hot-end had rotated a little and found it had loosened off and could easy be moved by hand. I've not had the nozzle fall out and/or scratch the bed so must have just caught it in the nick of time. Checking these thumbscrews has become part of my between-print checklist.
TBH I'd never thought to ask if this was normal, a potential problem, or just another me-issue before seeing this thread

RE: Thumb screws vibrating loose on Core One

Geoff Steele — Tue, 05 May 2026 03:51:06 +0000

I can imagine the lower one might cop a bit of heat. If the nextruder was long-term I might consider it, though checking those two thumbscrews when I clean the nozzle between prints isn't a hassle really

RE: Thumb screws vibrating loose on Core One

Robin_13 — Tue, 05 May 2026 02:51:44 +0000

I wonder if you put a small "O" ring under the head, it may work like a lock washer due to the friction. I have seen similar things done with other equipment.

RE: Thumb screws vibrating loose on Core One

Geoff Steele — Mon, 04 May 2026 22:59:53 +0000

I do swap nozzles somewhat frequently and a while back noticed the hot-end had rotated a little and found it had loosened off and could easy be moved by hand. I've not had the nozzle fall out and/or scratch the bed so must have just caught it in the nick of time. Checking these thumbscrews has become part of my between-print checklist.

TBH I'd never thought to ask if this was normal, a potential problem, or just another me-issue before seeing this thread

RE: Thumb screws vibrating loose on Core One

cwbullet — Mon, 04 May 2026 22:46:26 +0000

Thanks. I might try that.

Posted by: @hyiger
I didn't have both thumbscrews get loose but I did have one do that. It happened when I was still very new to the printer, tried to remove the nozzle without loosening the screws, and bent the tip of one of the screws. I had to order replacements. Unless you frequently remove nozzles maybe a small amount of blue Loctite?

RE:

hyiger — Mon, 04 May 2026 22:12:41 +0000

I didn't have both thumbscrews get loose but I did have one do that. It happened when I was still very new to the printer, tried to remove the nozzle without loosening the screws, and bent the tip of one of the screws. I had to order replacements. Unless you frequently remove nozzles maybe a small amount of blue Loctite?

Thumb screws vibrating loose on Core One

cwbullet — Mon, 04 May 2026 22:09:31 +0000

Anyone else having an issue with the thumbscrews vibrating loose after several prints and the nozzle dropping and scratching the bed?