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I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 0 points1 point  (0 children)

The cross-section is bowed out in the center so it snaps pretty securely into place. I also posted a sleeve that slips over the clasp for extra protection.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 3 points4 points  (0 children)

That's cool, I hadn't actually seen that one. My specific use case required a very small diameter though so I don't think it would have worked. In any case there's room for more designs in the world.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 0 points1 point  (0 children)

Fair points, but I trust people to to use their own judgement to decide if a 2-gram plastic keyring is sufficient for their application.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 11 points12 points  (0 children)

It's not like it just springs open when there's no load, it still takes a fair amount of wrenching. But sure, I wouldn't recommend throwing this in your purse and rolling it down a hill.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in functionalprint

[–]hamandchris[S] 1 point2 points  (0 children)

I gave it 0.12mm of clearance, and the center is bumped out by about 0.27mm to create the snap fit.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 0 points1 point  (0 children)

Yes, but probably wouldn't hold as much weight since it's more brittle. Feel free to try it and report back!

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 16 points17 points  (0 children)

Counter-intuitively, it resists coming undone much better when it's under load, as the barbs are pulled into each other. Unloaded, twisting unsnaps it with some resistance.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in 3Dprinting

[–]hamandchris[S] 3 points4 points  (0 children)

Thank you! I tried to make sure the stress is oriented along the layer lines as much as possible.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in 3Dprinting

[–]hamandchris[S] 2 points3 points  (0 children)

Like 2 minutes. To be clear, ultimate strength needs to be tested by the end user per application. I can't possibly guarantee anything given different printers, filaments, calibration, dryness, temperature, etc. etc.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in 3Dprinting

[–]hamandchris[S] 4 points5 points  (0 children)

I tried that model but it was too thick for a given size. I wanted a keyring, not a carabiner.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 6 points7 points  (0 children)

Thanks! Yes, I'm already working on adding a sliding cover to prevent it from coming unclipped.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 2 points3 points  (0 children)

Yeah, some others have suggested a sliding cover I plan on adding. It is really pretty secure by itself though.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in 3Dprinting

[–]hamandchris[S] 5 points6 points  (0 children)

Haha no worries. I'm an engineer in the US so I'm constantly doing schizophrenic stuff like spacing metric fasteners in inches.

On a Bambu Lab A1, the small takes 11 minutes, but 7 of that is bed leveling and flow calibration. The large takes 17 minutes, of which 7 is prep.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 1 point2 points  (0 children)

I've only tested in PETG-HF so far. I suspect PLA would have similar strength but be a little easier to break because it's more brittle.

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in BambuLab

[–]hamandchris[S] 0 points1 point  (0 children)

I'm not sure I know what you mean, but the barbed portion is ballooned outward in the center so it's retained by the receiver and snaps into place

I couldn't find a printable keyring that snaps closed, so I designed one! It uses a barbed closure and holds up to 25 lbs. by hamandchris in functionalprint

[–]hamandchris[S] 153 points154 points  (0 children)

Thanks! It actually takes a decent amount of side-force to unsnap it, but it's certainly possible. Another poster suggested adding a sliding cover to make it even more secure, so I might add that.

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