I may have got a bit carried away with modding my black cart into a TIG welding cart...
I combined some welding cart ideas I'd seen online over the years, along with some ideas from this thread, and drew up some 14ga sheet metal parts in Solidworks to get laser cut. Also got a 1/4" steel top and some brackets cut at the same time.
This is the result:
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The reason for the Snapon hinge upgrade is twofold. Some have reported that the struts fail completely or become so weak they won't hold the top up. Secondly they position the lid at 90 degree to the box. Now if you add weight to the top in the form of a mat, it could accelerate the failure of the struts.
I haven't done the hinge mod yet but I have noticed that my struts aren't quite as strong as when they were new.
That makes sense. I think I'll do it then, as I'd not considered that the struts will fail over time. The Snap-on listing has me a little confused. Is it one hinge for $11 or is that two?
I may have got a bit carried away with modding my black cart into a TIG welding cart...
I combined some welding cart ideas I'd seen online over the years, along with some ideas from this thread, and drew up some 14ga sheet metal parts in Solidworks to get laser cut. Also got a 1/4" steel top and some brackets cut at the same time.
This is the result:
![]()
![]()
![]()
![]()
I may have got a bit carried away with modding my black cart into a TIG welding cart...
I combined some welding cart ideas I'd seen online over the years, along with some ideas from this thread, and drew up some 14ga sheet metal parts in Solidworks to get laser cut. Also got a 1/4" steel top and some brackets cut at the same time.


okay, last post for the night about my 'super-service-cart'. promise
i thought it important to add what might me obvious to some and not so clear to others, as with most of the info in my many posts tonite. and being that my drive for not only the mods but all the details is that there isnt all that much out there in the way of this particular set of boxes (aside from GJ that is much love to this forum) i wanted the next guy to have less to figure out than we all did.
so on to it then. 2 additional points i feel need be made about this cabinet mod.
1. the drawers on the cab and the cart open differently, and the cab drawers dont have the nifty lock to one side like the cart does. instead it almost feels like some kind of magnet, or secondary internal latch or detent that keeps them shut. unknown how long that latch will stay strong, but going on 2 years on the cart latches with no issues.
2. the keys on the locks, and the way the locks work, are quite different. the cart is just a hook that catches a loop on the lid when the key is turned, and the act of closing the lid actually latches all the drawers shut. i dont know as much about the cabinet, but im guessing there is alot more linkages involved.
the key on the cabinet is bigger than the cart and the lock almost feels sort of spring loaded. its not easy to get the key to hang in the lock if you desire it so.
so here's a pic of the 2 keys side by side for comparison. again, the posts ive made are detailed for the next poor shmoe who decides to do this mod. i hope its been detailed enough
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to the left is the cabinet key, the right is the cart key.
and because we all like to remember fondly of where we came from, here's how i started out at work. a 2 drawer box on top of a BS used and broken service cart. ahh memories...
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It is two hinges. I received mine yesterday.That makes sense. I think I'll do it then, as I'd not considered that the struts will fail over time. The Snap-on listing has me a little confused. Is it one hinge for $11 or is that two?
I like what you have done with your cart. I don't have one and am surprised to see that it can hold the additional weight of the top, bottle, etc. Did you have to beef up the basic structure of the cart to hold the weight?
You have inspired me to swing by Harbor Freight and take a look.

Would anyone recommend how to go about filling in the open gap at the bottom of these tool carts? With more drawers?
I have a Black 4 drawer US General cart.
Any help would be much appreciated! Thanks in advance.
KentuckyAvalanche, as PelicanPines mentioned, putting a second set of drawers from a black 4-drawer cart is a great solution. Back around post 417, ford guy showed how he did it. Some of his photos have been lost but this is how it came out:Would anyone recommend how to go about filling in the open gap at the bottom of these tool carts? With more drawers?
I have a Black 4 drawer US General cart.
Any help would be much appreciated! Thanks in advance.
The top section floats above the bottom, using the original lips that hang on the vertical supports. I used a high speed pnuematic cut-off wheel to make most of the cuts. This open section works well, 'cause I plan on adding a power outlet next to the bottom section's original lock hole. I picked up a 100th anniv Harley Emblem that will be mounted on the bottom box to cover the old lock hole. I had to drill and file the holes square to mount the bottom box to the vertical supports.
Here's the front, as of tonight...
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Here's the back...
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Another mod I'm working on is to close the corners in, at the drawer edges. Of course, it will be powdercoated in gloss black to blend in. (it is currently the light gray color angle iron)
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As i posted earlier, I mounted an old Snap-On lock and got it working well. But I can't seem to leave it alone. I'm now looking at adding the locking rods I pulled from an old KRA4100 series top chest.
Bob
Someone has some more detailed pics of theirs, here's mine: https://www.garagejournal.com/forum/showthread.php?p=3230801#post3230801 I may have some "in progress" pics I could dig up but I don't remember off hand. I got all the info I needed on how to do this from this forum (I think this thread even).Would anyone recommend how to go about filling in the open gap at the bottom of these tool carts? With more drawers?
I have a Black 4 drawer US General cart.
Any help would be much appreciated! Thanks in advance.
I bought the 4-drawer cart last weekend. I was fully prepared to go for the 5 drawer, but the size of the thing would have made it impractical for my small setup. Plans are to include a 15A box for electrical and to use it to store duplicate tools and consumables.
Purpose will be to shuttle tools from my main box to the next bay over where the tractor resides. Now to convince myself I really really don't need a 3/4" drive set.
(love this thread)
Does that feel unstable set up like that?I'll add my frankencart to the thread here too.
I'll add my frankencart to the thread here too.
That's the HF Epiq setup LOL. Did you use washers or something to space out the locker so the lid would have room to close/open?
Thanks for sharing. I may add the 7 drawer to mine
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I added a 7 drawer to mine & now thinking about adding another to evenly distribute the weight. Besides I would like a bit more storage space for air tools.