off road trailer coupler

mesha

By endurance we conquer
Supporting Vendor
Location
A.F.
#1
I have been using my little off road trailer for several years now. I love it and it has gone many places with me. I am thinking about building a trailer coupler for it. I like the max coupler, but was thinking of a slightly different approach.

Would a 1.25" heim joint work? I can't really see a problem, but I am not very far into the thinking about it process;).
 

Caleb

Super Moderator
Super Moderator
Supporting Vendor
Location
Riverton
#4
The problem I could see with a heim is noise. Heims always end up getting noisy over time, I would think especially if it's used as a trailer hitch of sorts. I really like the idea of the Max Connector where it uses bushings.
 

mesha

By endurance we conquer
Supporting Vendor
Location
A.F.
#8
What about a large joint like the teraflex large flex joint? It is rebuildable, has a bushing so it won't be noisy and a lot of articulation.
 

skippy

Pretend Fabricator
Location
Tooele
#9
What about the size of bolt that each joint uses I am not sure but I think the 1.25 heim would take a bigger bolt and that may be better
 

mesha

By endurance we conquer
Supporting Vendor
Location
A.F.
#10
I dont know the bolt size on the terajoint, but I also think the heim would be bigger. However, the terajoint style has a ball rather than separate spacers which I kinda like.
 

TJDukit

I.Y.A.A.Y.A.S.
Location
Clearfield
#11
What about the Metal Cloak duraflex joints? They have builder joints that will fit into most "johnny Joint" style housings including Teraflex joints. You wouldn't get any noise at all.
 

mesha

By endurance we conquer
Supporting Vendor
Location
A.F.
#12
What about the Metal Cloak duraflex joints? They have builder joints that will fit into most "johnny Joint" style housings including Teraflex joints. You wouldn't get any noise at all.
Those are definitely something to look at.
 

Caleb

Super Moderator
Super Moderator
Supporting Vendor
Location
Riverton
#13
I think a joint like the teraflex joint would be ideal. I'm unfamiliar with the Metal Cloak duraflex joint so can't speak to it. I wouldn't worry too much about the size of the bolt. Look at the size of a traditional trailer pin, 3/4" or so and they're rated to tow way more than you'll ever be towing with your offroad trailer. I would say as long as you're similar in size or bigger, I wouldn't think twice about it.
 
#15
I would worry about breaking the center ball out of the housing -- especially with the johnny joint style. All these joints are made to load in 1 plane only. No professional mechanical engineer would design a coupling like in the photo. But, the shear size of a 1.25" heim joint with a small (1000lb?) trailer is probably robust enough. You definitely want brackets above and below the heim (double shear) in case the ball breaks out. The thread will also tends to loosen when the trailer twists past the misalignment capacity of the joint in 1 direction.
 
Last edited:

Bob B

Registered User
#16
This is how mine turned out. I made it out an old teraflex flex arm. It rotates on the threads of the arm. I welded a very, very thick "washer" on the end of the threads inside so if the threads should fail, it wont pull apart. I left the flat plate long. My intentions are to cut it back into the side brackets. I also have to drill a hole in it. Much like the true Max coupler, I will use a bolt through that plate and down into a normal hitch. A couple brass bushings between some metal for happiness...Full rotation and articulations on all axis. Whatcha think?


IMG_20130922_132747_347 (1).jpg IMG95201309229513292095375.jpg


IMG95201309229520443595726.jpg IMG95201309229520452395596.jpg
 

I Lean

Mbryson's hairdresser
Supporting Vendor
Location
Utah
#17
Yours looks good, Bob! Except you have the brass bushings upside down in your pic. ;) The big one is supposed to go between the flat plate and the hitch.
 

mesha

By endurance we conquer
Supporting Vendor
Location
A.F.
#18
That looks like a pretty awesome set up. In the picture with the bushings it shows quite a bit of overhang on where the bracket will be mounted. Is that how you are going to mount it?
 

Bob B

Registered User
#19
No, once I finally mock it up on the jeep, I will cut it back to make it as short as possible. Most likely the bolt will go through the plate about a inch infront of the upper bushing...Hope that makes sense.


CARL: thanks I couldnt remember where which one went.
 
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