dazmo Posted August 18, 2007 Share Posted August 18, 2007 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. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3295754 Share on other sites More sharing options...
r33_racer Posted August 19, 2007 Share Posted August 19, 2007 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. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3297102 Share on other sites More sharing options...
Roy Posted August 27, 2007 Share Posted August 27, 2007 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 Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3311912 Share on other sites More sharing options...
r33_racer Posted August 28, 2007 Share Posted August 28, 2007 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. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3315086 Share on other sites More sharing options...
hrd-hr30 Posted August 28, 2007 Share Posted August 28, 2007 Tha CAMS Manual is on-line now - here's the CAMS specs for cages. Tells you everything you need to know... CAMS Schedule J - Safety Cage Structures Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3315181 Share on other sites More sharing options...
r33_racer Posted August 28, 2007 Share Posted August 28, 2007 awesome harry...so does that mean you dont have to buy it now..it is the complete thing? Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3315248 Share on other sites More sharing options...
Beer Baron Posted August 28, 2007 Share Posted August 28, 2007 i don't know about the full manual but I get the cams handbook every year and it has all the cage specs and cage drawings in it. it's free. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3315276 Share on other sites More sharing options...
Duncan Posted August 29, 2007 Share Posted August 29, 2007 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 Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3316474 Share on other sites More sharing options...
dazmo Posted August 29, 2007 Share Posted August 29, 2007 Posted some pics of the cage in my R33GTR in the show me your racing machines thread in the motorsport section.Check it out if your interested. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-3316619 Share on other sites More sharing options...
Drift Motorsport Posted February 26, 2009 Share Posted February 26, 2009 updated link for cams regs: http://www.camsmanual.com.au/pdf/10_gen_re...dule_j_q109.pdf Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-4448258 Share on other sites More sharing options...
W0rp3D Posted February 28, 2009 Share Posted February 28, 2009 (edited) updated link for cams regs: http://www.camsmanual.com.au/pdf/10_gen_re...dule_j_q109.pdf Are you trying to sell cages? This is the second old roll cage thread you have dug up. Edited February 28, 2009 by W0rp3D Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-4451111 Share on other sites More sharing options...
Drift Motorsport Posted March 1, 2009 Share Posted March 1, 2009 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. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-4451948 Share on other sites More sharing options...
boz_soljah Posted December 31, 2009 Share Posted December 31, 2009 does any1 no how to bend pipes proply without a pipe bender for a role cage Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-5010993 Share on other sites More sharing options...
Craved Posted January 2, 2010 Share Posted January 2, 2010 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. Link to comment https://www.sau.com.au/forums/topic/174160-roll-cage/page/2/#findComment-5012453 Share on other sites More sharing options...
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