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Workbench Creations is the place for conversation and discussion about do-it-yourself (DIY) projects. This DIY blog will feature projects completed by its owner as well as projects completed by other do-it-yourselfers. Workbench Creations is the place where DIYers can discuss ideas, learn about what others have done, and share their expertise.

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DIY Tow Hitch

Posted April 22, 2009 9:55 AM by frankd20

Let me begin by saying that this is one of those rare projects I've done that if I had to do it again, I wouldn't. Not that it was a nightmare project – the finished product came out fine and worked just as it needed to; it was just that the time and money I spent making this project negated most of the reason for making it in the first place.

The premise was this: I have scrap metal; I can weld; I can cut. With all these things in mind, I figured it would be quick and easy. The goal was to build a tow hitch for my car – one that wasn't that obtrusive and would be strong enough to tow a boat.

I started out researching what tow hitches were available for my car and how they connected. All of them bolted directly to the frame of the car in place of the hooks that are often used to secure the car when towing.

I removed the bolts holding the hooks, made some metal plates with holes, and bolted them on. Once the mounts were made, I cut a hole in the plate for square stock and welded it into place.

I bought the hitch receiver and welded this to my assembly, which I made sure was centered before welding. For the side with the exhaust, I used thick steel plate that went above the muffler and then welded a right angle part to add strength. The hardest part was getting everything to fit just right and not hang down below the car too much or interfere with anything.

After making sure all the welds were secure, painting and mounting it on the car, and jumping up and down on it, I towed a boat and the hitch worked just fine.

Ultimately, even though it would have cost me a little more, I would have saved a lot of time just buying a hitch for my car.

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#1

Re: DIY Tow Hitch

04/22/2009 10:46 AM

it was just that the time and money I spent making this project negated most of the reason for making it in the first place.

Can't start doing cost-benefit analysis on DIY stuff! We'd never build anything if it had to make sense.

Nice piece of work, tho!

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#2
In reply to #1

Re: DIY Tow Hitch

04/22/2009 11:11 AM

While I somewhat agree with you, most of the projects I do I often find were worth doing. My projects often fall into one of three categories,

1. I can't get it anywhere else so I make it.

2. I can make it for a factor of 10 or so less than what it would costs to buy.

3. Or it would be such an easy and fun project to make its just not worth buying.

In these cases time and money spent I find is worth it and this is often the case for me. With this tow hitch project the cost savings was at best 50% and it took a lot of time. When I started I thought I could do it mostly with scrap metal, but in the end I needed to buy a few parts that raised the cost.

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#3
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Re: DIY Tow Hitch

04/22/2009 11:14 AM

I continually make these investments in my own skills, not too sure what day they actually pay off since I rarely am doing the same thing twice.

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#4

Re: DIY Tow Hitch

04/22/2009 5:39 PM

Yeah, you could have bought one, but we wouldn't give you nice strokies would we?
There are plenty of cheque book hobbyists ..
'Look what I bought yesterday'....
'Uh? Yeh, nice....'

I'm sure If I totted up the time I spend mking bows, I could buy 'em cheaper...but it's the uniqueness....
Can't beat building it yourself...you know exactly how it works and how to fix it if you do get problems.
(I bet all the local cats rub up against it too...whereas they probabbly just pee on the commercial ones)

Oh, yeah, it is nice and unobtrusive too.
Del

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#5

Re: DIY Tow Hitch

04/22/2009 6:55 PM

Dear Frankd20, Are you sure you would have done something better with the time and money?

One time I was doing something and a guy asked me why I was doing it that way, and I told him I was doing it, and he wasn't.

You know you could probably pick up a girl by saying, "Yeah, my hobby is making trailer hitches."

Girls like guys who have weird hobbies.

Yeah, I see you now out in the parking lot showing off your trailer hitch. It's about 10:30 PM. She is impressed!

Later you discover, if you had not made your own trailer hitch you would not have sons and daughters and grandchildren and all would be shuffling around in Wal Mart looking for a ten dollar toaster with fried eyes from florescent lights, your brain a buzz of wonder at ugliness, and a sadness all because you did not make your trailer hitch.

Cheer up, money isn't really time.

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#6

Re: DIY Tow Hitch

04/22/2009 11:56 PM

Hey, you made out far better than this guy...

Class lll Hitch Install... (patent pending..)
Wouldn't you love to see how the trip went...? Good chance he ended up doin' some unintended off roadin' somewhere. Check the 'hills' in the background. Howja like to meet this rig on a two-lane road....coming down the mountain in your direction...?

She's hitched up and ready to roll!! Amazin' how the extra weight smoothes out the ride. Needed to air up the rear tires a bit ('bout 160 psi).

Added some super heavy-duty chain for extra support on the tailgate, (note the "Heavy-Duty" S-hooks to attach the chain) Also paid-up for some BIG Number 5/16 sheet metal screws to attach the Reese hitch frame to the tailgate (see 'em there? one on each side...) Likely two more through the carpet into the floor pan inside....
Yep, probably overkill, but didn't want the possibility of having an axerdent.

Most of the time was spent on the front porch whittling down that MASSIVE solid pine 4x4 to fit precisely down into the hole in the ball mount receiver.

Note also - The 14"x14" piece of 3/8" plywood on the underside of the tailgate to distribute the load more evenly and beef up that tailgate support.

'A MAN CAN'T BE TOO SAFE'...!!

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#7
In reply to #6

Re: DIY Tow Hitch

04/23/2009 6:54 AM

I sure hope the VERY 1st cop that saw that thing stopped him and wrote him up a very $$$$ ticket and told him to call someone to come and get the 5th wheel trailer towed by a properly outfitted truck.

How can anyone be so stupid?

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#11
In reply to #7

Re: DIY Tow Hitch

04/23/2009 10:46 PM

GA Scotch, This rig is one for the Darwin Award.

Here's the scenerio: The first time he hits a bump, the front end goes skyward, can't do a thing about it because he cant, see anything. Won't matter. By now the rear wheels hit the bump, smashes the halves of the tailgate together, splitting the 4x4, those smarmy little S hooks straighten out about the same time the driver hears an awful noise. Putting on the brakes results in (1; The trailer brakes pull what's left of the tailgate off, or (2; Whats left of the tailgate winds up on the dashboard. In either event it's a 6,000 lb. (est.) loose cannon. No sway bars, no breakaway chain. Sheet metal screws?

How can anyone be so stupid? Beats the hell outa me.

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#8
In reply to #6

Re: DIY Tow Hitch

04/23/2009 9:41 AM

I just had to reply to CSM Engineer's pictured rig. The trailer is obviously a 5th wheel trailer. The advantage of a fifth wheel trailer is that the tow rig carries a large percentage of the weight (usually centered above or even forward of the rear axle of the tow vehicle to prevent this problem.

But how is a person of limited means to tow a trailer without an available pickup? My best idea is to rent a tow dolly used to carry the front wheel of a towed car. This even includes a pivoting platform to allow the car to pivot on turns. Now just rig a mount to carry the fifth wheel on this pivoted platform.

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#9
In reply to #6

Re: DIY Tow Hitch

04/23/2009 4:56 PM

I was just going to say that the DYI hitch would be a nice thing and you'd enjoy doing this, could face some problems and learn a little bit solving it, untill I saw the photos... After some moments trying to bring my mind back to reality, after figuring out if we are not just lying in a jelly connected to a great installation serving as power supply to a big computer, I had to vote for good answer. I really think CSN Engineer made a great contribution to this forum, remembering that just a few part of us are engineers, or show any level of interest in solving things the right way, and that any answer in CR4 could be potentially deathfull if incorrectly understood. Remember: the one that made this stuff could be the next to ask something here... how would him understand it?

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#10

Re: DIY Tow Hitch

04/23/2009 9:16 PM

so who is responsible if your boat disengages from your car with your homemade hitch that you "jumped on a few times, seemed OK"? A lot of research and testing is done on this type of unit before it is released to the public along with load capacities and limits etc. I would prefer to use a good quality "Name Brand" unit. Just my thoughts.

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#12
In reply to #10

Re: DIY Tow Hitch

04/24/2009 3:56 AM

(I s'pose I should get all my bows inspected by a certified mechanical engineer too)

Some people just don't get it that there are skilled people with a feel for the materials and processes they use. Ok, if it was being engineered to be minimum weight/maximum strength then some calcs would be in order, but the average Gibbon could work out what was required by looking at the strength of the mounting points on the vehicle.

Ok, take potshots at me if you like, I can take it, I'm wearing my aluminium foil body armour (the calculations tell me it'll be fine)

Del

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#16
In reply to #12

Re: DIY Tow Hitch

06/03/2009 10:41 AM

I'll inspect your bows anytime Del.

Sad thing is, you probably know far more about their performance than this qualified mechie! Your knowledge of defence equipment is slightly less than optimal though!

PS Spooky finding this thread today - a colleague and I were discussing the legal modification that can be made to an F150 to add a 5th wheel towing hitch for just this situation. Since F150s imported into the UK tend to have a Cummins A or B series 4 cyl/ 4 litre Diesel engine inserted (mostly for running cost reasons), this seems like a good engineering solution.

For the uninitiated, the Cummins B series 4 litre is used to power the Dennis Dart buses found in London and other cities in the UK.

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#13
In reply to #10

Re: DIY Tow Hitch

04/24/2009 11:11 AM

I agree with you that making your own toe hitch is a risk one that I had to evaluate before I used it, and is one of the reasons I would buy one if I had to do it again.

That being said, In this case I over engineered the hitch as much as I could. It is designed so that even if most of the welds broke, it wouldn't just fall off. In the bracket connected to the car I cut a hole for the square stock put it through the hole and then welded it. Even if the weld broke, this would likely still stay connected to the car. In every toe hitch I saw sold for my car, everything is welded and would come completely off if the welds broke.

As for my comment about jumping up and down on it, that was more of a joke. I did test it to make sure nothing was loose and it didn't budge at all but I didn't really jump on it. I put it through its paces on a private road and did things like hit the breaks hard, accelerate and turn hard and other sorts stress it might experience. I also only used it on local roads not going very fast.

Should people not make anything themselves these days because it hasn't been properly tested and approved? Perhaps we should just buy everything and not even try.

Then again I fix things that have been tested and approved all the time, and often I find that the bad quality and manufacturing is the reason it broke in the first place.

Who is going to fix these quality issues and manufacturing issues if no one is learning anything new.

I have worked as a quality engineer in a manufacturing plant in the past, so I know what goes on.

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#14
In reply to #13

Re: DIY Tow Hitch

04/24/2009 10:05 PM

You sound like you are a reasonable person with due respect for the engineering required for this type of application.

Unfortunatly I meet a lot of very smart guys in their field but have no idea of other stuff. ie- which end to hold a hammer! DIY trailer hitches are not the the thing to be done by just anyone.

When I go to U-Haul to rent a car carrier they will not rent to Ford Explorers(?) and visually check my hitch for stickers and Class Ratings.

Hidden Hitch has some very nice units that actually do almost hide under the bumper and are certified by vehicle and tow rating. My next door Industrial unit renter installs these hitches and I am amazed at the intricate pull wires and captive nuts along with reinforcing plates that are required to install these units.

A small trailer, which you may have, hooked to reasonable size vehicle, if enginneered properly will probably work just fine. But to say this is the same, as someone has said about building a cross bow, it is not the same thing as the crossbow when it breaks may at the worst injure the operator, but the trailor letting loose could injure or kill an unsuspecting person or family.

You indicated that you inserted the cross tubes thru the mounting plates and welded. This is a good thing that works well but others trying to duplicate your results may not realize this technique.

I saw the other attempt at a hitch and can only say Please "do not try this at home!"

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#15
In reply to #14

Re: DIY Tow Hitch

04/26/2009 12:17 AM

I fully agree that many projects I and others do should not be attempted by someone who has no clue. Risks are involved with everything, and everyone has to evaluate this on their own before doing something.

It amazes me how many people do things they had no knowledge about. Of course you almost never hear the story about the person who made something and it worked well. You mostly here the stories that end in tragedy, because they make the news.

Everyone is at a different level, their are people who would hurt themselves trying to open a can of soda. Its unfortunate that everyone doesn't think things through before they do them, it would save lives.

So, with any of my projects, many of them are dangerous, and many of them should not be attempted by others. This is for each individual to evaluate, but if in doubt don't do it, and if you do anyhow, don't blame me if it ends in tragedy.

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