From Newsgroup: rec.crafts.metalworking
"Bob La Londe" wrote in message news:10d8hal$2vi8$
1@dont-email.me...
I decided I need (well want anyway) a tube bender. ...
Yes, I know I can buy a knockoff of other designs on Amazon that uses
available premium manufacturer's dies. I actually liked the look of the
Got Trikes design better, and I was getting a little excited about
building it myself. Oh, well. If you think of buying their plans I
suggest you contact them first to see if they respond.
Bob La Londe
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https://www.machineseeker.com/Pipe-bending-machines/ci-1049?
The blue "Unbekannt" (unknown) machine there looks simple to copy and collapsible to store or carry. The cylinder attachment is at the
unpressurized spring-return end and might be channel iron bored to fit under the screw-in end fitting. A half-round die groove of custom size can be
milled with the blank on a rotary fixture with its axis horizontal and the endmill (roughing) or boring head (finishing) tangential to the die circumference.
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