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3d printed threads in TPU
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this post was submitted on 25 Mar 2024
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Teflon seals threads vs water or air, and works more like anti-sieze than a thread-locker. Coincidentally, Thread-locker can also keep water out, but I have no idea if there's any point in trying to use it with TPU.
I made flat head bolts out of pteg for solar panel mounted to my sailboat and while towing it to the lake they ripped out :( (and I lost the panel)
I made the bolt head like a flat washer so I could glue it to the boat then set the panel on it and secured it with a pteg nut.
What was the failure mode? Did the glue holding them down fail, did the nut rip off the stud, leaving a stud glued to the boat, something else?
Failures are never fun, but they can still be a great learning opportunity.
The pteg failed (sheered off near the "head" of the bolt/stud. The flat washer like heads were all still attached.
I had to replace the panel, and just went with SS screws right into the fiberglass. I also tape the leading edge during transport.
I'm guessing air got up under the front lip and just poof off it came. In my case these were fairly small which I'm sure didn't help my case.
Thanks for the follow up, as well as the photo!