April 06, 2004

Coping notes

This is just a validation of the latest rendition of my Tube Coping Calcutor thingie. Using a PDF turned out to be a pretty good idea after all. It scales perfectly. Here's a 20 degree joint on 1-1/2" schedule 40 aluminum pipe. Plenty close enough for rock + roll.

If anybody uses this to make something, send me a picture, and I'll post it. I seem to have a small following among off-road vehicle customizers, but I haven't seen what they're making yet.

And here's something I forgot earlier. It just shows the difference that various wall thicknesses make in the pattern. The calculator thingie plots the pattern by figuring the intersection of the inside and the outside of the cut tube, and then taking the smaller number. It's true! This basically squares off the sharp edge of the joint, which makes it quicker to cut and better for welding anyway. Unless you're brazing, which takes too much patience for me anyway.

diagram Posted by Hal Eckhart at April 6, 2004 06:11 PM | TrackBack

nice site

Posted by: vimax at April 30, 2004 11:32 AM

Hal....I used to use the old miter program for my notch's used in my bike frames, but this version is much better in my opinion. Here are a few of the frames that I have made using your program. Thanks



Posted by: suicycle at November 5, 2005 12:10 AM

Hal, thanks a lot for the useful program! I'm bending and welding pipes for rollcages, winch bumpers, and all sorts of metalwork for my safari vehicles in the middle of Africa, and this little gem makes things much easier.


Posted by: Philip at February 21, 2010 11:33 PM
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