Box trailers

[DeeTurbo]

Have any of you guys had any experience in building a trailer?

I need to refurbish my trailer and the suspension units need replacing and the timber that lines it could do with sorting out. I was thinking of replacing the wood with something else but I'm not sure what to use.

[cully]

I built a 6x4 trailer from scratch the frame is made from unistrut
a frame is unistrut
axel is 40mm box section with mount plated welded for the suspention units
base of mine started out as ply but I was wearing it out so replaced it with alloy checker plate
the sides are galvanised steel

good source of spares ideas

http://www.towsure.com/trailers-trailer-...its-mounts

i have an old book here somewhere with trailer plans il see if i can scan it in

[DeeTurbo]

Thanks for the link Cully.

My trailer was bought of ebay for £70, used it three years now so not bad. I didn't know at the time the one suspension unit rubber is deteriorated. It was also wired wrong with the brake lights coming on with sidelights and vice versa.

I mainly use it to transport my kart with a few spares in the trailer. I've put a ply top on it which my kart sits on.

I think most the timber is OSB and not great when its wet as the base has started to sag and I fear it would give way if I had anything heavy in there.

The main chassis looks good but the angle that goes around the bottom of the box had broken the other day which I had to weld the day before I needed it. The day I went to bring it back from a meeting I forgot it was hitched, went to reverse, it came round and snapped a trailing arm on it.

I would like to keep it as light as possible and I was thinking about using something like alubond, used some at work before not sure where to get it or how much it cost. Ideally I would like to keep the cost down.

As you can see the arm probably wouldn't have lasted long with all that rust.



The tow bar is all bent over and the damage to the side of my car from the impact.


Had to get it home on my roof bars.


The kart on the trailer, ideally it would be nice it was fully covered but I don't think that will be possible.

[cully]

if you know what the hubs are you may be able to buy 1 suspention unit with a stub axel that takes your existing hub and bearings
the just weld /bolt it on the axel

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http://www.ebay.co.uk/sch/i.html?_sacat=...ion&_frs=1

[DeeTurbo]

Yeah that's what I was thinking of doing.

The units are welded on this but I'll weld plates on so future replacements will be easier and also make some adjustment possible if required.

The guy I bought it off had put the drums off a 206 on so it could take the larger wheels.

The stub is 25mm, 80mm long and 20mm of that is thread.

Do you know when they advertise the shaft length is it including the threaded part?

Also about the weight, my kart weighs 70kg, spares that I keep in the trailer around 20-30kg if the trailer weighs 50kg would you say the 150kg rated units would be ok to use or would you go for a high rating?

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Thinking about getting these http://www.towingandtrailers.co.uk/cgi-b...tegory=171

[Magenta Sunset]

not a box but,
timber is 'marine ply', no rot even after a decade or two. solid beam axle, new hubs & 8x4 wheels.

[tysonbully2k12]

Built afew trailers by now, i use 3 leaf leaf springs and weld box section to hubs for the axle.
     
As for the floor, aluminium chequer plate or sheet steel would be your best bet.
Enclosing it i would build a box that you roll it in to then bolt it to top of your trailer.
     
That design but to fit your kart

[Seb_Ryan]

They look like individual suspension units to me.. 250kg ones. Have a look for rhino board, its what ifor williams use, about 60 quid for 8x4 sheet but its 18mm think and will last years.
Brake wire could be a bugger as both brakes run off one wire (red) and side lights use brown for right and black for left

Sent from my GT-N8010 using Tapatalk

[Eeyore]

not a box but,
timber is 'marine ply', no rot even after a decade or two. solid beam axle, new hubs & 8x4 wheels.

what a lovely interior!

[Dum-Dum]

My trailer project is here http://306oc.co.uk/forum/showthread.php?tid=33666

Bought a braked trailer on eBay for £20 and am in the process of doing it up.

Oh and ply is phenomenally expensive these days, about £30 for an 18mm sheet of marine grade.
I used the slightly cheaper structural grade and varnished it. It was almost tempting to do a steel floor in 3mm or 4mm as it wouldn't of been hugely more expensive or heavier and would have lasted forever if given a paint every decade or so.

[toseland]

as long as you can suitably seal the ends, and additionally ensure that no damage to the ply allows ingress of water this is fine dumdum, but the glue is not "as" waterproof in regular building ply. so any water that gets in will degrade it this would not happen with marine ply.