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  #1  
Old 01-11-2007, 08:40 PM
mikeCJ-7's Avatar
mikeCJ-7 mikeCJ-7 is offline
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Roll Cage

Sometime this spring/summer I am going to build a new roll cage for my CJ. I am currently buliding my tube bender and am starting to look at the dies that I am going to need. What radius works best for roll cages? I am going to use 1.75" DOM 0.120" wall. I was thinking of using the 6" CLR Die.
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  #2  
Old 01-12-2007, 03:58 AM
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B-Rad B-Rad is offline
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Its a YJ body but its the same as a CJ7. I have a 1.75 die with a 6" CLR. Its not done but will give you an idea of how the radius looks


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  #3  
Old 01-12-2007, 11:21 AM
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TheBandit TheBandit is offline
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All my tube work has been with a 1-3/4"x6"CLR die as well. It's a great size for a cage. At that thickness you might be able to go tighter with DOM or cromoly, but on HREW I wouldn't go much smaller because it will start to neck down in the bend area with smaller CLRs. Plus you may want to use it for thinner wall tubing in the future

Here are some pictures of work I've done with 1-3/4"x6"CLR



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  #4  
Old 01-12-2007, 12:15 PM
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akecj7 akecj7 is offline
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I am going to use 1.75 6CLR or my cages and bumpers when I get my bender done.
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  #5  
Old 01-15-2007, 05:43 PM
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mikeCJ-7 mikeCJ-7 is offline
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Can someone show some pictures of how to properly tie the cage to the frame. I have seen some other methods of how some folks have done it and it does not appear to the safest method.

Also would it be best to leave the original bar and build off of it or just build an entirely new cage. I purchased the jeep with this already done and figured it would be best to just remove everything and start over.

thanks
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  #6  
Old 02-16-2007, 11:46 AM
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Cirbo Cirbo is offline
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http://www.polyperformance.com/shop/...cat=551&page=1
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  #7  
Old 02-25-2007, 09:19 PM
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TheRamChargerMan TheRamChargerMan is offline
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new question to this thread......

Will 1.75 tube be ok for my truck, or should I go with 2" for the main hoops ?

The truck is a fullsize ramcharger (hence my screen name), and will most likely weigh in around 6000 lb when done. it weighs 5200 right now, with only a 6 pt bar and 1/2 ton axles, as well as a SB engine, & stock bumpers.

A BB, 1 ton or rockwell axles, and larger tires, as well as a full cage are planned.

I have a protools 105 HD bender, and will be converting it to hydraulic once I get the stand built. I currently have a 1.75 x 6 clr die, and if I can safely use 1.75, I'd like to do it. If not, I'll just get another die for the 2".
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  #8  
Old 02-25-2007, 10:32 PM
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russellmn russellmn is offline
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1.75 should be fine. Most of your strength will be in the design. Triangulate well and you don't need 2"
NHRA only requires 1 5/8" for (as far as I know) down to 6.50 et.
Unless you plan to run faster than 200mph or just wanna jump off a cliff with it you shouldn't need to be stronger than those cars are.
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Old 02-25-2007, 11:15 PM
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GRANTZJ GRANTZJ is offline
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this is a TJ cage with a 7 inch radius.....i know nobody really ever uses this large of radius on cages, but the die was on sale when i bought the bender......sorry bout the pic quality i dont have any others at the moment.....



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  #10  
Old 02-25-2007, 11:34 PM
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TheRamChargerMan TheRamChargerMan is offline
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Quote:
Originally Posted by russellmn View Post
1.75 should be fine. Most of your strength will be in the design. Triangulate well and you don't need 2"
NHRA only requires 1 5/8" for (as far as I know) down to 6.50 et.
Unless you plan to run faster than 200mph or just wanna jump off a cliff with it you shouldn't need to be stronger than those cars are.
I agree on the speed part, but if it does fall on it's roof, it weighs probably twice as much as the cars in the nhra

the hefty weight was my concern
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  #11  
Old 02-26-2007, 08:31 PM
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russellmn russellmn is offline
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I hear ya there, but I figure if it can take a hard hit on top when a car rolls on it's side and slams into the wall, it can probably take the hit of a truck rolling over on it. Even going end-over would be less impact than the drag cars take.
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