tuber/roll cage q

[stampedecrawler]

hey so when making a bumper, roll cage or tuber chassis i want to use brass so do i use rod or tube as tube will crush on rolls? or solid is more rigid or is it ok as tube?

thanks!

[Katon]

Solid is heavy, my first tuber im making now is 3/16 brake line, make sure you clean it and remove the galv before you weld. I use a torch and lincoln electric welding rods, brass rods flux coated.

[jwalker]

he is talking about brass not brake line. brass is strong in a solid rod but i would think the tube would be too soft. it is cheaper to use stainless brake line.

[stampedecrawler]

^ ok thanks, i like your sig ;)
how do you braze aliminum 1/4 tube? or will that be too weak also?
what size brakeline do i et and should i order it from repco and other auto shops we have (btw, my dads a mechanic so i get trade price hehehe)

[Katon]

Sorry I mis read you were talking about using brass to make the bumper... Id probably still go with the steel brake line, 3/16 is a good size, depending on scale ive seen some guys use 1/8th" rod, even 1/4" brake line. On a nasty fall you can bend anything reguardless of the material. Brakeline is just pretty cheap and they sell it at pretty much any auto part store.

[stampedecrawler]

yeah i will use 1/4 brake line, i also just tried bending a little tube i found on a prado fuel tank left out for srcap, with pliers and and vice, pipe kinks flat but get a spring and slide it over do the same and u get a real nice, round bend for those who dont know haha

[smallblock500]

u can also get brake line benders from the auto parts store they dont make super tight bends but they get the job done.

[warriorsimi]

i use 1/8 " rod or 3/16ths rod it is cheap and strong and easy to braze brakeline is about 7 bucks for 5 feet and it kinks if you don't use a bender with the rod i can bend it by hand or stick it in the vise and bend it by hand and get really tight bends i can do a 90 degree bend with no problem a 20 foot section will cost me about 4 bucks.1/4 inch rod or tube looks too big.

[mysterygamer]

does anyone know where someone can buy it in a bulk the local store here sells it 1 m for 9 dollers and can you tell me where u can get plans on different custom tube frames that can be copyed thanks

[matador88]

the problem is, that i was told in our country steel brake line is not saled at all. only brass. so my question was the same - is the brass frame strong enough for truggy cage, sliders, bumpers..? my idea was that structure makes it solid..
as i understand - its also easier to braze brass than steel. as i can have only small micro butane torch setup doing it inside small room.

[vw_thing]

Originally Posted by matador88

the problem is, that i was told in pur country steel brake line is not saled at all. only brass. so my question was the same - is the brass frame strong enough for truggy cage, sliders, bumpers..? my ide was that structure makes it solid..
as i understand - its also easier to braze brass than steel. as i can have only small micro butane torch setup soind it inside small room.

Brass rod will be strong enough, just a little heavy. Brass tube needs a little extra bracing. 1/8in (~3mm) solid rod will do well for bracing ~5mm tube.

For brazing brass, make sure the rod has a low melting point (well below ~920*C, preferably closer to 500-600*C). Your butane torch should do fine.