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Roll Cage!

bLaQ.bOi

By bLaQ.bOi,
in Fabrication

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dazmo Proficient

dazmo

Posted
Posted

The cage would need to be made from cold drawn seamless steel or crome moly. If it requires cams approval it will also need to be welded by a certified welder and designed around cams specificationd. The bends in cages are not actually done with a mandrell bender as there is no way to phisically run the dye through the pipe when the length is so long they are actually cold bent useing a good quality hydralik bender so as not to stretch the tube to much I will post some pics of my cage in my R33GTR in the next few days.

r33_racer Grand Master

r33_racer

Posted
Posted

since when did it need to be welded by a certified welder? have the rules changed recently?

I made our roll cage in our race car and its cams approved....Coincidental i happen to be a fabricator by trade so i guess that makes me approved to weld, but at the time i wasnt aware it had to be welded by a certified welder....strange the chief cams scrutineer never mentioned that. I guess the rules have changed over the last few years.

But yeh...CDS which i think had a grade of 350 or higher and chromemoly are the only properly approved materials to fabricate your cages from at least for cams spec anyway.

We have a electric over hydraulic bender, right die for it and no worries with bending the tube cold.

Roy Grand Master

Roy

Posted
Posted

You dont have to be a qualified welder, but it helps. Otherwise the cage may not pass the visual inspection. Plus, if it was my cage, i would want to know that the welding is in conjunction with an approved weld procedure that has undergone tensile testing, radiography etc etc

If you try to use chrome moly for your cage and want to get it approved and log booked then you are up for some expensive engineering. So whilst the material itself is approved, any cage with chrome moly needs the engineerign carried out as you are no longer using the recommended diameters and wall thickness as per the FIA/CAMS guidelines

r33_racer Grand Master

r33_racer

Posted
Posted

I havent checked the latest cams book, but surely they would list what diameter pipe and wall thickness the chromemoly would need to be that would comply. Yeh there is alot more fuss when welding chromemoly then just straight mild obviously. Needs to be preheated to the right temp and then tig welded and then probably some post heat so it doesnt cool too fast so it doesn't lose its tensile strength.

Duncan Grand Master

Duncan

Posted
Posted

like harry said the full manual is online now, they send out the small versions with a couple of sections to NC and PC now as well as L2S.

its not really free though....they left the license fee the same but don't provide the book any more....nice one CAMS.

there's nothing like having a open a computer when you need to quickly check something at the track :D

  • 1 year later...
W0rp3D Grand Master

W0rp3D

Posted
Posted (edited)

Are you trying to sell cages?

This is the second old roll cage thread you have dug up.

Edited by W0rp3D
Drift Motorsport Community Regular

Drift Motorsport

Posted
Posted

W0rp3d - FYI, there are only two rollcage threads in the fabrication forums wtih different info. I have supplied more or updated information to assist others in their roll cage building instead of starting my own thread asking similar questions.

I have no plans to sell cages. I would like to build my own cage for my R32 and hopefully get it CAMS approved if not go to a CAMS workshop to get a cage installed.

  • 9 months later...
Craved Grand Master

Craved

Posted
Posted
does any1 no how to bend pipes proply without a pipe bender for a role cage

you need a mandrel bender - home roll cages arent reall the go - get one made up and weld it yourself is better than trying to make one from scratch without the right equipment.

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