Roll Cage Help!!

[orygunbou71]

I bought a Roll cage off of craigslist and it fits the bronco. is there any way to tell if the tubing is good quality dom tubing? I just don't want to put it in without knowing if it will actually take a roll!

 

[fablife]

measure the od, tubing is measured od 2" tube is 2" od. the only one to worry about is 1-3/4".. 1-1/4"pipe is 1-3/4" od also,,
1-1/2" pipe is 1-7/8" od. As far as wall thickness, you have to drill it.
but pipe is strong too, dont under estimate it! its the design and welds that are more important. JD

 

[bronconut73]

Post photos. Someone here will likely recognize the design and be able to tell you who made it.

 

[orygunbou71]

i posted a picture in my garage of the cage

Post photos. Someone here will likely recognize the design and be able to tell you who made it.

 

[u10072]

More than likely an old smitty built -- you are good to go-- that's 2" x .120 tubing and does take a roll.

 

[jim3326]

If you have a spot that has no paint, look around the circumference for a weld seam DOM won't have a seam CREW does.

Jim W.

 

[Apogee]

If you have a spot that has no paint, look around the circumference for a weld seam DOM won't have a seam CREW does.

Jim W.

DOM does have a weld seam, it's just also been drawn over a mandrel (DOM) to remove the weld flashing from the inside of the tube and make the wall thickness slightly more uniform than the CREW it was made from.

Seamless tubing does not have a weld seam as it is manufactured from a solid round bar and then pierced by a die. Seamless tubing tends to be more common in the larger wall thicknesses.

 

[jim3326]

All the DOM I've ever bought never had a seam that was readily visible or obvious where the crew was.

Jim W.

 

[asinor]

Crew and hrew are fine for rollovers. If you are building suspension parts, tube chassis, or something that is going to see race conditions (Baja, KoH, etc), Dom will be slightly better.

The differences are the Dom has had a mandrel pass through it that forges the weld seam against a die on the outside. The weak points are the welded joints regardless of the tubing type.

BailieBilt cages are not DOM.

 

[Hozr]

Drill a hole - Seriously! We drill 3 x 3/16" holes in the roll cages of all race cars to verify materials. Do it in a non critical / non visible area and use a caliper to measure. Only way to know wall thickness.

 

[xcntrk]

There has been a lot of talk about DOM and HREW tubing among off-roading circles and I'll try to answer a few questions that you may have about the differences.

DOM is a process and means "drawn over mandrel". Typically you use DOM when you require precise thicknesses in the ID, OD or wall thickness of a tube. It is not seamless but is made from sheet steel, rolled and electric resistance welded and finally, "DOM'ed". DOM is a cold process. Most typically it is made from low to medium carbon steel.

HREW is cheaper than DOM, but isn't as nice. HREW has a seam weld, as does DOM, but DOM is taken a few steps further to counteract the welding and cold working abnormalities for a straighter stronger piece of tubing. But as far as strength goes for bumpers and sliders, HREW will sufficiently do the job except for applications that require extreme strength.

If I were building a purely competition rock buggy where I would be getting into areas with large drop-offs, I would probably use DOM, but for the kind of off-roading that most people do and even for the occasional rock competition, I would probably go with the HREW.

In summary, DOM is a stronger tubing material than HREW, but costs about twice as much per foot. HREW is more than sufficient for most off-road applications.

http://www.savageoffroad.biz/DOM-vs-HREW_ep_42.html