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1 vote

How is this metal, hollow sphere manufactured?

It looks like you've already received a pretty solid answer on how this specific ball was made (and I agree that it looks like it was welded). For what it's worth, there are a few cases of hollow ...
Jerry Coffin's user avatar
1 vote

How is this metal, hollow sphere manufactured?

On the video on David Harber - mantle at 15 s in you can see this internal shot. It appears to me that 1, 2 and 3 are continuous connections but 4 is overlapped and indicates an extremely neat weld. ...
Transistor's user avatar
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