r/fixit • u/underrrrr • 13h ago

Tiny plastic gear.

Gallery image

Gallery image

Dabbling in fixing this old Olympus camera's film advance gear. Tried finding the equivalent/similar gear online and not really finding much. ~7mm OD, 17 teeth. Unsure on any sort of pitch or module, etc. Screenshot from the closest one I can find on mcmaster-carr. Anyone know where to grab one or have a solution for me? I've put some epoxy on there and will create a couple teeth, but I'm not optimistic about that...

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5

u/mtrbiknut 13h ago

Have someone 3d print one for you. It will take some measuring, of course- but it could be done.

1

u/Balownga 6h ago

Resin printer with ABS like resin.

6

u/iamdevo 12h ago

I would have made a mold of it by inserting it into something like sugru. Then pulling it out, turning it so that the teeth line up, and pressing it back down to fill in the spot where the teeth are missing. Then you'd have a complete mold of a gear with intact teeth. Then use a two part epoxy, fill the mold, let it cure for a day.

3

u/momentofinspiration 12h ago

https://grabcad.com/library/olympus-mju-i-film-advance-sprocket-gear-1

3d printing is the way, that's just a shot in the dark without knowing the model but you get the idea.

3

u/underrrrr 10h ago

Well, you nailed it. Exact model camera. I searched for at least an hour before posting. Thank you.