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Old 01-08-2007, 10:23 PM   #1
snowbear
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Default Grader ball suspension

Curious if anybody here has run anything like this?







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Old 01-08-2007, 10:33 PM   #2
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Default Re: Grader ball suspension

What keeps it centered side to side?
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Old 01-08-2007, 10:40 PM   #3
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Default Re: Grader ball suspension

picture #3 keeps it centered side to side.
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Old 01-08-2007, 10:49 PM   #4
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Default Re: Grader ball suspension

thats what they call a 1 link.they run it alot in austrailia.check out outerlimits4x4.com do a search there lots of info
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Old 01-08-2007, 11:10 PM   #5
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Default Re: Grader ball suspension

I've seen this a few times.

The panhard bar need to be longer.


Mark...
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Old 01-09-2007, 04:52 AM   #6
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Default Re: Grader ball suspension

Thanks. I'll check out the Aussies
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Old 01-09-2007, 08:26 AM   #7
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Default Re: Grader ball suspension

I think Deepmud runs that on his Sami.
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Old 01-09-2007, 08:33 AM   #8
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Default Re: Grader ball suspension

Ya, check my build up thread Samurai on 39's
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Old 01-09-2007, 05:21 PM   #9
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Default Re: Grader ball suspension

I am no suspension expert, and I am getting pretty rusty on my suspension theory, but I do know a couple things about this design.

This is a setup that is normally better suited for short, low, and otherwise light weight rigs.

The panhard typically should be as long as possible and for our use, be mounted as high as possible.

I hate to do this, but I would recommend doing some research on the PBB, there are a few good threads about one link suspensions on there.
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Old 01-09-2007, 06:51 PM   #10
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Default Re: Grader ball suspension

Thanks Brook. I saw comments about it not being too good for heavy rigs. I'll study more to try and understand the downsides better. It just looks so quick and simple.
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Old 01-09-2007, 07:07 PM   #11
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Default Re: Grader ball suspension

except for Unimogs - if you have a long, heavy Unimog, the one-link works pretty good





Really - there are comprimises with the one link - I think it's best in the back with a long link - up front there are clearance issues that make a simple 3 link w/panhard look pretty attractive. Some of the builds I have looked at on POR make the builder REALLY unhappy - mostly when the builder wouldn't mount the link low enough, in concern of belly clearance. I personally like the simplicity of it - but I don't know about the cost-value that gets mentioned sometimes, especially the grader-ball if that is chosen. They seem to run about $250 each. My 1 1/4 Heims are a bit over $100 each - they may be overkill, but it's hard to justify smaller/cheaper when so much is riding in the one joint. I think the heims will not fail by coming apart, they'll fail by dislocating the ball, and pop out to one side or the other, and rattle and clank but still keep the axle basicly aligned.

My link has BARELY been tested - I drove it up to about 40 mph - I hit the throttle hard and it doesn't jack up the back end, a sign I got it long and low enough in the rear, and seems stable enough during the little amount of cornering/turning I did. One trip, not enough to tell you "It's great"

some POR links
http://www.pirate4x4.com/forum/showthread.php?t=235977

http://www.pirate4x4.com/forum/showthread.php?t=283119


shelljeep's onelink - he's not thrilled with it - and he has good explanations why.

http://www.pirate4x4.com/forum/showthread.php?t=421467
there! that should keep ya' awhile
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Last edited by deepmud; 01-09-2007 at 07:09 PM.
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Old 01-09-2007, 08:37 PM   #12
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Default Re: Grader ball suspension

Quote:
except for Unimogs - if you have a long, heavy Unimog, the one-link works pretty good

hence the following...

Quote:
This is a setup that is normally better suited for short, low, and otherwise light weight rigs.
Since we are on the topic, maybe we should delve into how a unimogs portal axle affects suspension reaction due to the link mounting points often being in a different location in relation to the axles axis of rotation.
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Old 01-09-2007, 09:20 PM   #13
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Default Re: Grader ball suspension

How about a long heavy duce?
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Old 01-09-2007, 09:44 PM   #14
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Default Re: Grader ball suspension

That panhard bar scares me.

If you search around you can find better examples of one links than that. There are several on POR in the toy forum, ill look around and see if i can find any. Dont think i would ever run one on anything bigger than a toy mini.
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Old 01-09-2007, 09:47 PM   #15
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Default Re: Grader ball suspension

Quote:
Originally Posted by redbulltoy View Post
That panhard bar scares me.

If you search around you can find better examples of one links than that. There are several on POR in the toy forum, ill look around and see if i can find any. Dont think i would ever run one on anything bigger than a toy mini.
what panhard scares you? one from one of the 3 POR links or mine?
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Old 01-09-2007, 10:10 PM   #16
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Default Re: Grader ball suspension

Quote:
Originally Posted by bgreen View Post
hence the following...This is a setup that is normally better suited for short, low, and otherwise light weight rigs.
You sound grumpy Brook, you know it's nuthin' but love, right?

Unimogs ALWAYS get brought up in 1 link threads

I don't know that they work well in short, light rigs - you'd think they need to be long to deal with torque reaction better. There's one on a Scout, I think of that as pretty heavy and long - sort of low I guess. they do tend to steal belly clearance for sure (onelinks do).
Then there's a plethora of Rockwell-One-Links - all pretty humongous. They may not work so well but the 2nd hand reports seem ok.
Shelljeep is relatively small and light, and he doesn't like it - so I don't know what to say about "usually" .

But it's hard to "adjust" a onelink - if the measurements don't work out - it pretty much doesn't work, while a 3 or 4 link has stuff you can do to the separation and angles to tune it.



Quote:
Originally Posted by bgreen View Post
Since we are on the topic, maybe we should delve into how a unimogs portal axle affects suspension reaction due to the link mounting points often being in a different location in relation to the axles axis of rotation.
I'm reading this over and over - I think you mean how a unimog might be different than the typical one-link? Since Unimogs link mounting points are ALWAYS the same - the torque tube has a joint right at the tcase flange, while other versions are in other locations. It's great for a zero-travel slip-yoke. I think Unimogs actually comprimise link location to make the Torque Tube work - if I can find a pic of a flipped Mog you'll see they offset the tube to one side - so the joint lines up with their offset tcase - you'd think this would make them have a weird roll-axis. Maybe it does but they are too big for you to feel it. They have a great sidehill capability.

The biggest complaint I read about for 1 links is anti-squat can be out of control -the long links on Mogs seem to take care of this - or maybe their low power output. But I think the reason it works well for Mogs is they are so big and long and heavy. So I teased you, Brook - just a little What do I know? I'm pretty much a full time web wheeler anymore
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Old 01-09-2007, 10:36 PM   #17
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Default Re: Grader ball suspension

torque tubes - adapted to a non-mog tcase I believe.

j

Notice they are asymetrical - not the same from side to side - not an even "T" on the end - weird eh?
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Old 01-10-2007, 09:35 PM   #18
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Default Re: Grader ball suspension

Quote:
Originally Posted by deepmud View Post
what panhard scares you? one from one of the 3 POR links or mine?
I was refering to the pics at the top of the page. Didnt check out the ones on POR. I think that a one link is a good way to go when you arent looking to get huge flex or going to be running high speed stuff. It looks like on the back of your rig you made the panhard as long and as parallel to the axle as possible. Im real interested to see how well the whole setup works. Hopefully by next year i will be running a 4 link in the rear of my truck, well see how much money i make this summer and how much work my motor needs first.
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