They’re working on removing this. When you read about the dev “stripping out websockets” that’s part of what’s changing.

Hey, thanks for your interest! I edited the post to add an ‘exploded’ view of the parts. This is prototype #2 and still has some significant issues that I’m working on (and would love community input on!)

My strategy for a watertight print is as follows:

• lots of perimeters and solid layers top/bottom on the individual parts
• sand mating surfaces smooth and add TPU grommet/seal
• apply significant pressure to compress the TPU to form a seal

This has actually worked extremely well. The pump has leaks but none of them are from the 3d prints or mating surfaces. What I’m struggling with is preventing water from going out the shaft tunnel. This is a major issue because I’m currently using a chrome-steel bearing at the top for shaft concentricity, which will rust out almost instantly. I made the challenge harder for myself by using a hexagonal drive shaft so I can’t rely on tight tolerances there to keep out the water. I need to sort out a strategy for packing / sealing and/or switch drive shafts + use some kind of off-the-shelf option.

I’ve also been looking into an alternate bearing solution e.g. ceramic. If I can find a good sealed bearing that won’t rust I might be able to just use a tight TPU seal between hex shaft and bearing ID to give it a watertight seal.

The original design had several chrome steel bearings in it (newbie mistake) which I had to replace at the last minute with the nylon bushings. I’m working on a better solution.

edit: see video I just added in the post as well

Thanks! They’re offset - I’ll post a video of it working soon.

right now it’s more of a learning project than anything although I have some ideas I’ll share if they come to fruition :)

Looks great!

I’m researching adding a packing box to the design and switching to a round shaft. I think that’ll work better.

Haha thank you! Yeah flat gasket is simpler & has worked so much better than past attempts at o rings and such. Definitely the way to go in my opinion. Just keep in mind when the grommet is compressed it grows horizontally slightly so you may need to inset the perimeter slightly. (You can see I had to do that with the interior section)

Ok - here’s what I’m thinking for the rotating shaft seal:

Basically integrating a “packing box” like what’s used for boat propellers

Step 1: post content to fediverse sites Step 2: engage with existing content in a useful and meaningful way

If you build it they will come. Part of what makes reddit successful is that a good portion of Google searches lead to a reddit thread. Why? Because the content is there.

That’s adorable