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pipe miter

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Bernd:
I don't think the rise angle will have anything to do with the angle you need to cut the pipe to give you the 144º bend.

Tin on HMEM confirmed what I said here. I think your making this more complicated than it needs to be.

I would use two pieces of wood and cut them as Peter suggests and see if that's what you want. Make the two pieces of wood the width of the pipes dia.

Bernd

ieezitin:
Gentlemen



This is a rolling off set, the miter has to do two functions swing an angle (off set) then roll up at an angle.

Allot of people have answered my question I thank them but all the answers I am getting is just for a general miter.

My first sketch has the wrong angles I have amended this with another sketch. All so read the drawing as an Isometric three dimensional.

I did not mean to complicate it its my fault for a bad drawing.

Berned I think your right I maybe making this too complicated, I have read a lot of peoples answers and gone into the shop and tried it just don’t seem to work, where I offer the two pipes in the air at the given  elevation changes  and the angled off set I see the joint of being a mixture of both angle change and elevation in the angle from one pipe to the other.

I think this is one of the hardest times I have had to put into words a complicated math problem.

Hopefully this next sketch helps.

Thanks to all again.   Anthony.

ieezitin:
This is the best drawing yet on my problem

Compound Miter is the term that eluded me.

Anthony.

Bernd:
Now that last drawing made it perfectly clear. You are going up and then around a corner. And yes that will be a complicated bit to figure out on paper.

If I were going to do that I would actually try to use the pipe mount it to the side of what ever you are going to mount that pipe on and have at it with a saw were they meet. If possible that is.

And this is were I drop out of sight with this problem.  :lol:

Good luck. I'm sure you'll let us know how it turned out.

I would have though Marv would chime in on this math problem.  :poke:   ::)   :D

Bernd

dsquire:
ieezitin

I think (and that is sometimes a bad thing) that we are taking a simple problem and making it complicated. The math has escaped me at present. When these 2 pipes are mitered and welded it will be the same as 1 long pipe with a bend of X degrees somewhere close to the center. Now if we take that pipe and lay it on the floor with nothing supporting it, it will lay flat on the floor. In that position you can see that there is only 1 angle involved. Divide that angle by 2 to get your cutting angle.

This is easy to do after the fact. Now we see how it can be worked out mathematically or making a mock-up. Take 2 pieces of something of proper length and make a mock-up the way it will be installed then measure the angle formed, divide by 2 and cut the same angle on both pieces and they should line up as perfect as what you measured.

Hopefully this will help rather than confuse.

Cheers  :beer:

Don

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