Sebastian Posted February 21, 2009 Share Posted February 21, 2009 I am constructing my roll cage since there are no options to buy one in my country. The guy that is building it has done several roll cages for rally cars. First progress was main hoop, when I saw it today the tube has a little bit flattened on interior side of bendings. Is it serious? Tube is 2" x 1/8". Quote Link to comment Share on other sites More sharing options...
Dave W Posted February 21, 2009 Share Posted February 21, 2009 If he's using an old fashioned hydraulic former to produce the bends then it isn't unusual to get a small amount of flattening on a 90 degree bend. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted February 21, 2009 Share Posted February 21, 2009 It depends on the tube really. The thicker it is, the less flattening you will get. It's only when it creases that you really need to worry. Quote Link to comment Share on other sites More sharing options...
Sebastian Posted February 21, 2009 Author Share Posted February 21, 2009 Yes, he's using an old fashioned tube bender. He claims that if we use 1.5" tube it won't bend. Should I prefer 2" diameter, 1/8" thickness tube with some flattening or change to 1.5"? Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted February 22, 2009 Share Posted February 22, 2009 1.5" seamed tube for a x Ton LR = a no no For some reason I seem to have less "Belief" in your 'expert' cage builder than you do ..... 48.3mm OD 3.2mm wall "Blue Barrel" Seamed BS1387 Corrus tube is about as lower spec as you would wnat to go on a LR Nige Quote Link to comment Share on other sites More sharing options...
Sebastian Posted March 2, 2009 Author Share Posted March 2, 2009 Nige, thanks for the reply, I decided to go with your tube spec. I have some pictures to show how cage is going. Also one more question. What is the best way to attach main hoop to chassis? I have attached a picture from below and from inside. Main Hoop How to attach it to the chassis? Thanks all for your help. -Sebastian Quote Link to comment Share on other sites More sharing options...
sean f Posted March 3, 2009 Share Posted March 3, 2009 If you download and read the ARC and MSA spec sheets for roll cages pinned in the Tech section you won't go to far wrong. They have good diagrams of how to make cages mounts and what specification of material to use. People have made changes to them on individual cages as there spec is really for competition level cages so you may not want to go that far if all you intend is a bit of extra protection for off roading, but I think the advice should always be if in doubt make it stronger. Quote Link to comment Share on other sites More sharing options...
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