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Old 07-09-2021, 05:37 PM   #121 (permalink)
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In the midst of this public flogging of a dead horse, here's a planetary thrust bearing:

https://www.thingiverse.com/thing:53451

(be aware that at ...?t=71 he shows a spool of filament with a free end. That's a big no-no)

Since the file on Thingiverse is parametric, I could print one with a 1" hex hole up to 8" in diameter. For my 25ft iron hex-bar shaft. VAWT on the top and my Fisher-Paykel washing machine motor on the bottom.

Proto-Pasta have bronze-PLA alloy. I think that that might make a self-lubricating part.

www.proto-pasta.com/products/bronze-metal-composite-htpla

It would probably take a $50 spool of filament with any decent amount of infill.

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Old 07-10-2021, 05:51 AM   #122 (permalink)
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Yeah, I don't see how that's relevant to the topic.
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Old 07-10-2021, 01:20 PM   #123 (permalink)
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I know. I didn't think it was worth a new thread.
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Old 07-10-2021, 03:08 PM   #124 (permalink)
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Quote:
I know. I didn't think it was worth a new thread.
Maybe this should be your signature!
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Old 07-10-2021, 03:32 PM   #125 (permalink)
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Why do I even try? My hope was that someone would steer it back on track by saying "You know, a bronze-PLA alloy might have good performance in the differential gear required".

Who am I kidding. I wanted to terminate the thread with prejudice.
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Old 07-12-2021, 04:56 PM   #126 (permalink)
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You don't learn a lot from looking at things you expect to happen as they do.
You can learn when something happens that you did not expect.
That is what attracted me to the whole Blackbird story.

Veritasium had a couple of perplexing physical situations in this video. They are more accessible than the Blackbird, that's for sure.
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Old 07-12-2021, 05:50 PM   #127 (permalink)
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Quote:
Originally Posted by DDG
The Most Exciting Phrase in Science Is Not 'Eureka!' But ...
https://quoteinvestigator.com/2015/03/02/eureka-funny/
The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found it!) but "That's funny …". — Isaac Asimov. In 1997 a book titled "Comet Hale-Bopp: Find and Enjoy the Great Comet" was released, and the author credited Asimov with a variant of the quotation
I printed out the gear bearing shown at #121. My first print-in-place success. I injected it with tooth past and ran it in with a drill motor for about 4-5 minutes. A really rough needle bearing.

The only use I can see for it is as a fidget spinner.

edit: I got the first two right, didn't see the third one coming.
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Last edited by freebeard; 07-12-2021 at 05:58 PM..
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Old 07-19-2021, 05:32 PM   #128 (permalink)
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What happens if you drop a slinky?

A very short but funny experiment:
What happens if you hang out a slinky on one end until it is at rest, and then drop it?

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