"brian" wrote in
message ...
I would like to make some 360 degree hoops of either 1/2 EMT, or
preferably
3/4 EMT for a model RR project ( helix construction). Would like to
get approx
60" dia circle. Can you tell me how I might best go about this?

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for full context, visit
http://www.polytechforum.com/metalwo...pe-639050-.htm

If you can't justify the cost of a tubing roller
https://www.harborfreight.com/tubing-roller-99736.html
you could bend it around a plywood form. I'd start at full size to
measure the springback, then reduce the diameter accordingly. You only
need a half circle which is all you'll get from a 10' length. 1" pipe
will slide over 3/4" EMT to give you better leverage at the ends.

If you have a good eye for shapes it can be bent between closely
spaced tree trunks, using a circle on cardboard as the pattern. I
straighten bent antenna mast tubing that way and once made a spiral
handrail from EMT for a staircase for a theatre set.
-jsw