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For a hollow tube inside a hollow tube, with a pin passing through both and a force pushing down on the innermost tube, what would the bearing stress be on the holes (assuming tube wall thickness is equal)? Would the equivalent reaction force be F/4 since the pin is passing through 4 holes? So...

I have a brass component from a pump showing signs of corrosion, namely dark reddish/brown spots splattered on it. It's my understanding that this could be signs of dezincification, caused by exposure to water, acid, or salt. Now, I've also seen a greenish/turquoise corrosion on brass as well...

I have a brass component showing signs of corrosion, namely dark reddish/brown spots splattered on it. It's my understanding that this could be signs of dezincification, caused by exposure to water, acid, or salt. Now, I've also seen a greenish/turquoise corrosion on brass as well which I've...

I'm creating a drawing using AutoCAD 2D. We do not have SolidWorks, so I can't rely on the program to decide for me where the bend lines are located.

For a flat layout sheet metal part, is the bend line located directly in the middle of the bend allowance section, or is it inset from one side by a distance of the bend radius? So for a U-channel with an opening of approx. 4.56" (distance between inside of legs), would the distance between the...