Widening a rollcage hoop?
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I have a rollcage for a car I am building and its about 3" narrower at the base (open end) than it is supposed to be according to the spec. I was wondering how can one widen it out? I talked with the company and they said one could do it by "standing up in the hoop" but thats damn near impossible as far as i can tell. I stretched it using ratchet straps. I pulled em far and I only was able to get about .5" worth of stretch after it relaxed. I was hoping to see if anyone has experience with stretching these things out. Thank you.
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you do not want it under any stress so disregard the post before this one. put one end in a vise and put a smaller length of tubing inside the free end then slowly start to open it up and dont jerk it to get it to bend. if you get the smaller piece long enough then you should have enough leverage to just pull on it and get the result you are looking for
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Well, my issue is more that when I stretch it it works ok, but when i release it relaxes back to the original size, it wont stay stretched. is there any way to get it to not relax or will I just need to sneak the crossbar in while it is being stretched?
I already used a pair of come along to pull it, i mean it was under serious tension. But, I was unable to get it to retain that shape, I'm more interested getting it to stay once its stretched. Also, this thing is seriously tough its 1-3/4" .134wall tubing, its really really hard to bend by hand.
I already used a pair of come along to pull it, i mean it was under serious tension. But, I was unable to get it to retain that shape, I'm more interested getting it to stay once its stretched. Also, this thing is seriously tough its 1-3/4" .134wall tubing, its really really hard to bend by hand.
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its just like collision repair in a body shop, you gotta bend twice as far back to take the memory out of it. And its mild steel not chromium molybdenum so it will bend like butter
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Good News everybody! Finally got it stretched, strung it to my 6x6 deck posts and used some come alongs and a 20000lb tow strap, finally got it widened, thanks for all of the input.