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Shot tower

en.wikipedia.org

61–70 of 80 posts

Re: Shot tower

#61

I've lived in Dubuque, IA (there's a picture of our shot tower in the article) my entire life, and assumed that everyone knew what these were. It's a iconic symbol in our city's history. I guess I took them for granted.

Is the factory at all noisy? I'd imagine dropping massive lead spheres could cause a ruckus.

Re: Shot tower

#62
The Dubuque shot tower is in my hometown. It's a really great piece of history but a shame that the site isn't more kept like the rest of the riverfront.

Re: Shot tower

#63
post #34
post #28

In my recollection, this is one in Austin, TX: https://maps.google.com/maps?hl=en&q=119%20West%208th%20Stre... I may be wrong though. I wasn't able to find any references about it easily.

I can't find a tall tower anywhere near your marker though.

Oops, try here:

https://maps.google.com/maps?hl=en&q=colorado%20and%20cesar%...

Re: Shot tower

#64

Earlier quoted context omitted.

When the metal is hot, solder remains melted, flows onto the metal and bonds to it. In fact, when soldering you should heat only the metal parts first and not the solder directly, and then apply the solder to the metal parts where the soldering iron touches them. You never heat solder directly with the soldering iron and expect it to stick to cold metal. When the metal is cold, the molten solder freezes up as it touc…

It sounded like a bad description of drag soldering which involves dragging a ball of solder over the pins with the iron and relying on the solder mask and surface tension to make a good connection on each pin.

Yes, judging from YT videos of drag soldering, this was what he did, except unlike people in those videos, he did it holding the circuit board vertically and hence it was one very quick move. Bear with me: this was almost ten years ago, I had nothing to do with electronics since, and I am not a native speaker of English!

Re: Shot tower

#66
post #60
post #2

You can try something similar to this (although more related to the older barrel technique) at home with a soldering iron . Melt some tin at the tip while holding the iron at a sufficiently large enough height over a glass of water. It takes some practice to make nice round balls, but it works!

Friendly reminder to exercise common sense when you do this. Wear eye protection, long sleeves, possibly gloves. And ffs DON'T FLING THE IRON. Your aim is not as good as you think it is. :-) Also, lead. Don't use a drinking glass.

>Also, lead. Don't use a drinking glass.

I can't check it for myself now but I assume this would also work with lead-free solder. Not that you should put any kind of solder in your drinking glass.

Re: Shot tower

#67
post #25

In the most restrained and calm way possible, I'm wondering why this is on Hacker News at the moment... A Wikipedia article, concerning a technology that is effectively ancient and indisputably outdated, seemingly with no relevance to any recent events in the tech world, or the greater world in 2013 for that matter. Occasionally it seems as if one could do "Random" Wikipedia click [0], find something marginally inter…

It's on Hacker News because 170+ people decided it should be.

Re: Shot tower

#68
post #42

I thought it was interesting that the modern "Bliemeister" manufacture method still consists of dropping molten lead drops. The difference apparently being the use of heated liquids and inclined surfaces for greater control. https://en.wikipedia.org/wiki/Bliemeister_method#Manufacture In contrast metal bearing balls are manufactured using cold metal working techniques. Sheering, pressing, grinding and polishing some…

Melting point of lead 327.46 °C, melting point of Iron 1538 °C. Additionally, I would assume that you have a lot less tolerances for bearing balls than for shot. So I assume that the much better process control for cold metal techniques is necessary for bearing balls.

Re: Shot tower

#69

I've lived in Dubuque, IA (there's a picture of our shot tower in the article) my entire life, and assumed that everyone knew what these were. It's a iconic symbol in our city's history. I guess I took them for granted.

Is the factory at all noisy? I'd imagine dropping massive lead spheres could cause a ruckus.

I think any metal working shop will be noisy. From watching documentaries metal heating furnaces are really loud.

Re: Shot tower

#70

I've lived in Dubuque, IA (there's a picture of our shot tower in the article) my entire life, and assumed that everyone knew what these were. It's a iconic symbol in our city's history. I guess I took them for granted.

Is the factory at all noisy? I'd imagine dropping massive lead spheres could cause a ruckus.

The Dubuque shot tower does not operate anymore.
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