?? for people with "one links"-Square vs round steel??

[wyldstallyn73]

On my third vehicle with One link ( I call it a wishbone) type suspension-- Front and rear. On the second wheeling trip I bent the rear "wishbone" a bit, now recently have noticed the front getting a bit of arc in it. I am using round stock- cant tell you the size or thickness off the top of my head, but I thought it would be plenty stout, after all, I am on my third build with this type of setup- maybe I am just getting more agressive. Anyway, all of the other one links I have seen on this site were made with square I believe. Anyone have any issues with their square wishbones bending and what exactly did you use?? Also, how foolish would it be to just straighten them then reinforce them vs doing it all over with something different/stronger/doubled up??

[Go2Guy]

square is stonger in this application- more meat furthest away from the neutral axis where the loads are, but most anything will bend if you bounce it off ledges enough

[lilwill]

We have used 2x3 box 1/4" wall with zero problems, this is on 7 rigs running rockkwells all with 42's or larger. PM me if you have any questions.


Will

[mj]

I am using 2.5" square, mostly 3/16ths wall as the metal shop ran out of the 1/4 wall
under construction so no help what-so-ever

[wyldstallyn73]

How does the square tube act when its dragged over a given object-- does it want to "hold" or will it readily slide off sideways??? I prefer the look of the round, but obviously will let that prefrence go in favor of strength, but it seems the round would lend itself better to sliding sideways on rocks/logs (if thats what you needed to do!)

[MUCHADO]

Ask Clint

[wyldstallyn73]

Cool pic, but mine is bending on the other end of the "wishbone"

Interesting bus/hauler in background too!!

[Ramrock]

I run 2x3x.250 wall. I wouldnt put no less. ive only hit mine a couple times. Sense it mount on top of the axle tubs of my rockwells. No problems after 2 year of wheeling it.

I bet that ball did break! If he was running coilovers. Probly way over flex the joint.

[MUCHADO]

Originally Posted by wyldstallyn73

Cool pic, but mine is bending on the other end of the "wishbone"

Interesting bus/hauler in background too!!

either way it's just 1 joint to break and yer ass is on the ground

[MUCHADO]

Originally Posted by Ramrock

I run 2x3x.250 wall. I wouldnt put no less. ive only hit mine a couple times. Sense it mount on top of the axle tubs of my rockwells. No problems after 2 year of wheeling it.

I bet that ball did break! If he was running coilovers. Probly way over flex the joint.

That's rock racing.... I heard it but didnt see it.... I think he just hit HARD...


either way... you're depending on 1 joint VS. 7 or 8

[Landslide]

This is deffenitly different - and at the same time, pretty cool...

[vetteboy79]

Originally Posted by RockStomper-Toy

This is deffenitly different - and at the same time, pretty cool...

Here's one for sale, $6000.

http://www.ksl.com/index.php?nid=218...&cat=143&lpid=



There's a guy with one of those up near here, I've seen it at Paragon AP a few times. Pretty nice setup, although the guy said he's not too thrilled with the ride quality on the highway.

[GaryTJ]

2x2 .250 wall square has a moment of inertia of .91109

2" round .250 wall has a moment of inertia of .53594

square is almost twice as strong in a given size..

this answer your question?

[vetteboy79]

Originally Posted by GaryTJ

2x2 .250 wall square has a moment of inertia of .91109

2" round .250 wall has a moment of inertia of .53594

square is almost twice as strong in a given size..

this answer your question?

This is all true (well, 1.7x as strong), but there's a little more to it than that. 2.5" round .250 wall has a moment of inertia of 1.132, yet weighs almost exactly the same per linear foot as the 2" square. Plus it's easier to find things like tube inserts for round stuff.

Yes, it's not the same size, but depending on what you're doing, there could be better basis for comparison than just physical size. If you're looking for strength-to-weight the round is better.

[GaryTJ]

very good points...

[MUCHADO]

Originally Posted by RockStomper-Toy

This is deffenitly different - and at the same time, pretty cool...

one of the 2 SXOR bus's....... we hung out with Jake, Andrea from SXOR the night before the Cortez XRRA race in the bust and look'd it over pretty good. It looks like a college dorm room... you know futon, car parts... well at least the way mine looked.

Apparently this isn't the super bling one, but the shop's black one even has fake beadlocks!

[wyldstallyn73]

Those of you running the 2X3, I assume you are running it with the 3 inch dimension running vertically???

Never heard of moment of inertia- is that just a fancy pants way of saying reaching the point of permanant bending???

Where are you getting these numbers at anyway??

Always wanted to do a bus setup like those but I dont think I can afford to feed one. Plus the extra registration, insurance, blah blah blah.

[MUCHADO]

Originally Posted by wyldstallyn73

Those of you running the 2X3, I assume you are running it with the 3 inch dimension running vertically???

Never heard of moment of inertia- is that just a fancy pants way of saying reaching the point of permanant bending???

Where are you getting these numbers at anyway??

Always wanted to do a bus setup like those but I dont think I can afford to feed one. Plus the extra registration, insurance, blah blah blah.

they are CHEEP.......... like under 2 G's

[the glassman]

im runnin 2 3/4 .250 wall round with a 1 7/8 center bar to keep the axle from rotating. havent been to the trails yet but have been testing out in the back yard and no problems yet. ive jumped mine about 3 foot and collapsed my bumpstop when it bottomed and no probs yet .

heres the best pic of my rear link, it has a few extra braces in it now but flexes a little to much...lol

[the glassman]

sorry i couldnt get it in the post above..

[wyldstallyn73]

Glassman-- Your pics dont really show how your one link is connected to axle housing, but if you have done it the same way as others, that extra top link will cause binding,,no??

[Rockcrawler_101]

one link compared to 8 i would pic one! You loose just one of those 8 your up shit creek too and you got 8 time more to loose, but i will say the 8 is safer because your axle will stay under you for the most part wtih just 7 and if that on link lets go you stuck with just two wheels.

[lilwill]

Originally Posted by wyldstallyn73

Those of you running the 2X3, I assume you are running it with the 3 inch dimension running vertically???

Never heard of moment of inertia- is that just a fancy pants way of saying reaching the point of permanant bending???

Where are you getting these numbers at anyway??

Always wanted to do a bus setup like those but I dont think I can afford to feed one. Plus the extra registration, insurance, blah blah blah.

Yes all of them are run with the 3" dimension vertical. If you are concerned about the friction of flat v/s round add some HPDE or UHMW to the bottom. I can't quote you numbers from a book or off an engineering site, but what I can tell you that we bash our shat, roll it, what ever. Built right, with quality welds and materials, it is a good set-up. The down side, it has zero adjustablity, where you weld it is where is stays. There are pros and cons to both, just pick the setup that most suits you and go with it.

Will

[the glassman]

sorry i dont have good pic of the mounts. Picture a threelink mount at the axle but all the bars meet just before the one link pivot point. Most people that run square or 2x3 tube weld or u bolt the link to the axle whitch is way easier but mine can be adjusted a little bit to compensate for a little to much beer while measuring...lol. I used 1 1/4 hiem for my pivote and we put a heavy u-bolt around the hiem and welded 2 pieces of tube for it to bolt through just incase it lets go like in the pic above so maybe the axle will stay under the rig if it lets go. . me and the ripper have tryed to work everything out before i built mine to hopefully not have to much trial and error.


oh yah if your center mount isnt perfectly square it the chassis the axle will not be straight in the chassis.I found out the hard way. hope this helps...eddie

[MUCHADO]

Originally Posted by Rockcrawler_101

one link compared to 8 i would pic one! You loose just one of those 8 your up shit creek too and you got 8 time more to loose, but i will say the 8 is safer because your axle will stay under you for the most part wtih just 7 and if that on link lets go you stuck with just two wheels.

ehhhhhhhh I'm pretty sure that's ALOT of load on 1 joint whereas on a 3 or 4 link it's spread out... also, if you lose 1 joint you don't loose all 8 unless you keep driving!