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5 votes
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Why do blacksmiths use these 2 tools which seem to do the same thing

One is called a press, the other is called a hammer. At this point I am just regurgitating what I have read. You can see that the press is able to shape the metal more which is is good in that it is ...
DKNguyen's user avatar
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5 votes

What is this "clamp" place on a piece of bar stock while turning it in a lathe for?

It's a lathe dog. It grips the part and extends over so it can be pushed by the spindle so the lathe motor can turn it. Like the chuck, it grips the part so the part must follow it in the ...
DKNguyen's user avatar
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4 votes
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Making hole in 1/8" Lead sheet with minimal dust/debris

Make a hole cutter like a shear against a surface and hit or press through. Similar to those pastry cutters, lead cuts easy enough. Make in the diameters required 6", 12" even 9" etc ...
Solar Mike's user avatar
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4 votes

What is the strongest sheet metal screw for 1/16 inch aluminum sheet?

Have you considered a Thread Setter? (Reference: Marson Thread Setter kit) Drill a hole through your base, put in the thread setter insert, and crimp it down. Then you have a strong thread to attach ...
ehbowen's user avatar
  • 223
2 votes

Are rusty stains allowed to happen with hot dip galvanized steel construction?

I don't want to make promises from a photo, but it is difficult to see any evidence of zinc coating. Not electrogalvanized, not hot dipped, possible a poor quality (thin) zinc rich coating ( paint).
blacksmith37's user avatar
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2 votes
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What is the definition of depth of cut in machining?

The maximum cutting depth is the deepest cut that can be made in one pass. Trying to cut too much will cause the cutter to dig in and achieve nothing usual. It can damage the machine. Consequently, ...
Fred's user avatar
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2 votes

Fabricating a Strong Hub Shell for a Bicycle

Do the geometric cut-outs in the center seem to serve a structural purpose ... Or will simply drilling large holes serve as a suitable weight-saving measure? No and yes. They add lightness! I ...
Transistor's user avatar
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2 votes

Making hole in 1/8" Lead sheet with minimal dust/debris

Depending on what's behind the sheet, you could use a hole punch (or wad punch, they're distinct) to put the initial hole through. After that use a hand nibbler, which will cut out a ribbon rather ...
Mark Morgan Lloyd's user avatar
2 votes

What would this fairly bulky machined piece be doing in a missile?

Yeah, it seems to be part of the hardpoint connection, although I found only two photos (of the same museum piece) that has that version The scale does kinda match, as the missile is about half a ...
against very long user names's user avatar
1 vote

Making hole in 1/8" Lead sheet with minimal dust/debris

Use a chisel and hammer. A narrow chisel will allow you to make a hole within the tolerance you need.
Hobbes's user avatar
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1 vote

Making hole in 1/8" Lead sheet with minimal dust/debris

A drill won't kick up dust. It will produce cuttings, but not dust unless you're abusing it. Drill at slow speed and a feed rate that ensures uniform chip thickness. It The chips will be easy to ...
vidarlo's user avatar
  • 140
1 vote

Fabricating a Strong Hub Shell for a Bicycle

I noticed that the orginal flanges are titled inward ever so slightly and there are similar lip and notches here and there that will have to be plain old 90° angles on mine. If (as the question ...
Jerry Coffin's user avatar
1 vote
Accepted

Making a basic sprung mechanism that can withstand moderate percussive force

I'd probably make the brackets out of a low-friction plastic like nylon. You could 3D print them, but they are (or at least can be) simple enough that there may not be much point. Assuming you're only ...
Jerry Coffin's user avatar
1 vote

What is the strongest sheet metal screw for 1/16 inch aluminum sheet?

It is the material thickness that is the issue. Consider using a backing nut to reduce the load on the thread in the thin material and also spread it over more area.
Solar Mike's user avatar
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1 vote

What material property (Young's modulus, HRC hardness, Max yield strength, etc) affects how easy it is to cut sheet metal?

The number is typically tensile strength and hardness. But you're overthinking it. Just go with the materials everyone uses by default: common aluminum alloys like 6061 or 6063, or mild steel. Common ...
DKNguyen's user avatar
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1 vote

Metal sheet forming - material properties when switching material

Springback will mostly be controlled by yield strength. And because all three materials have the same minimum yield (140 Mpa), the only option is to bend samples. You could get identical results with ...
blacksmith37's user avatar
  • 6,134
1 vote

How can I build propane torch burners that have a custom configuration?

I figured out how to do this by watching videos posted by AndrewW on YouTube. Andrew has done several different videos on fabricating propane burners of various kinds. The essential elements of the ...
Wallace Park's user avatar
  • 1,625

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