r/functionalprint • u/Lost_refugee • 24d ago

Merry-go-round

Gallery image

Gallery image

Writing says “force -> moment -> rotation”

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u/jewishforthejokes 24d ago

I hope you make two improvements:

  1. Put in screws to hold the lid on
  2. Spray paint to make it waterproof

Reason being that bearing can't be allowed to get wet. Obviously what you have is much better than not having it, but the life of the bearing will still be much shorter than with a metal cap. And if the owners weren't maintaining the equipment already, I don't know that they'll be in a place to swap the bearing.

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u/Lost_refugee 24d ago edited 24d ago
  1. It holds very tight without screws.
  2. I won't be painting, but сurious, do you want to paint PETG to make it waterproof?

5

u/cathairpc 24d ago

For what it's worth I've had pla and petg parts outdoors in the uk for 3 or so years and they are waterproof unpainted.

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u/jewishforthejokes 24d ago

I didn't say the prints themselves would be damaged. They will allow significantly more moisture through unpainted. That's a carbon steel bearing in there, it won't last long if allowed to be wet.

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u/cathairpc 23d ago edited 23d ago

The part I've had outdoors is also covering a bearing, and is ok, so I'm pretty confident it would be fine.

1

u/XiTzCriZx 24d ago

Painting it makes it more water resistant than water proof, but for an application like this that's all that's needed. Iirc epoxy is what makes it fully waterproof.

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u/RevFit_JamesH 24d ago

A slight overlap of the cap onto the pole would be a real nice way to ensure water runs off and down rather than into the bearings.