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pipe miter

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ieezitin:
Hi guys.

I need to make a handrail so I need to miter the pipe to make the joints, in the attachment is a hand sketched Iso it shows my runs, angles of rise and angle of turn.

What is the formula to making a swing joint off set miter joint. I really want to make a template out of card so I can wrap around the pipe and trace the line to make the cut on the pipe.

Or is there a simple program I could use to get the same effect.


I than you in advance.         Anthony.

Gadget:
Try this, I've got other links if this doesn't meet your needs.

http://www.metalgeek.com/static/cope.pcgi

Bernd:
Just off the top of my head I'd say two 18º angles. How did I get there. Well 180º minus 144º divided by 2 = 18º.

Ya I know I'm wrong? Right?  :scratch:

Bernd

P.S. Try it withsome cardboard first before you cut the pipe.  :coffee:

ieezitin:

Berned.
Your math is correct for a level miter, but I have a rise and angle projection together. I called that a swing joint( maybe wrong here).

In essence  my y value from left to right on the sketch is 71.58* rise from level heading to z,  my run is 64.875 then I hit my miter joint,  then at the joint I  rise 69.35* in z travel while 144* away from x value.

Yep before I cut the pipe I certainly will slice into card. This is a brain teezer, believe me I was at my welding table for an hour tonight fiddling with pipe and propping up silly stands trying to get a visual on this.

thanks

Anthony.

HS93:
Simple way to do it, I served my time as a joiner so had to do a lot of jobs like this in my time, we simply drew it out on plywood,then used the same bit of plywood to make a mitre box, using this methoud you can have two different sized tubes and still get the correct angle.
this is just an alternative way to do it and just posted so you can have alternative fall back, if you have one of these cheap power miter saws with a metal blade in use the piece of ply as a temlet to set the saw.

Oh and when you draw it out devide by 2 or  4  the two lenght's  but not the pipe size to make it managable to draw
Peter

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