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BOOM!

P

Puddles

Well-known Member
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What'd you think I had a bomb?

Another project for my little tractor. Always wanted a little more reach for it, like setting trusses. I had the 3” x 4” x 1/4” wall box tube, as with the 3/4” x 3/4” x 1/16” box tube. I bought the 2” sch 40 pipe.
It's a little over 7-feet long. Same system as the grapple, remove the bucket, and pin right up to the 3” x 4” box tube frame.
Boom.jpg



Used a 2 3/8-inch hole saw to cut the 3/4” box tube.
Holesaw.jpg


Going to weld a 1/4-inch grab chain hook on the end.
Weldtip.jpg


Used my Ellis band saw to cut the 2-inch pipe.
Fit.jpg

Gusset.jpg

Weldgusset.jpg


Here is where I got the idea, this boom was for sale on eBay awhile back.
Trussboom.jpg


Any idea what the safe working load will be for this?
Any suggestion for me to add before its complete and I paint it?
 
Add two triangular gussets on each side of the top round tube where it attaches to the top square tube to help reduce high tensile stresses from pulling the round tube away from the square cross tube. You may want to add some additional plates to the end where the pintle hook is attached. Tensile stress points are much more vunerable than compressive stress points.
 
Nice job on the boom.
I'm thinking you are asking too much out of the little tractor. 200 lb truss 9 feet out from the front of the tractor,plus the weight of the boom,on a 48" wide wheelbase platform. Better have alot of weight on the rear and hope the ground is very hard and there isn't a breeze blowing. I've set some 32 footers with the same setup on a 4440 (140 hp) Deere and it got alittle wobbly with the loader all the way up
 
great job on that!! love the shop tooo!!! dunno what the max lift would be on that, prolly need to hook up to something heavy and see how much it takes to tip 'er over!!! we set 60 ft trusses for a morton building with an 886 and an i beam chained in the bucket. that was a little on the scary side.
 
6010 tacks (possibly over MIG tacks?), 7018 welds and what looks like a MIG tack on the small sq. tubing. How was the weld on the square tubing done in your second last pic., looks like O/A or TIG? Did you burn a 6010 root pass before the beautiful 7018 passes? One other question, is the picture of the 7018 welds blurry so we're not embarrassed by are own pitiful looking welds? Nothing like having the right equipment for the job, especially the skills of a true craftsman!!!

Do you want it more for lifting or pulling. You could add a removeable wheel(s) near the end so the tractor wouldn't get sucked down when pulling a heavy load/trailer. Other than that, I think just some gussets like Vern suggested and you marked in red. I don't think you'd need them where the 3 tubes come together though. I doubt your tractor has enough power to break those welds. I doubt my Cat would break those welds. LoL Very nice work. Dave
 
glennster I just have a one man hobby shop, that is rapidly getting too small! I can't bring myself to get rid of any tools or equipment, guess I need to fire myself, so I'll have more room____ Wait will that work?
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Shop.jpg


Shopshed.jpg


Bridgecrane.jpg
 

Dave I can't see well enough to know what is blurry or not! I need cataract surgery sooooooo bad! I'm lucky to find the shop each morning!
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The little box tube was Tig welded. I only plan on using this boom to pick light objects! :wink:
 
I love that crane. Decades ago, did an alarm setup for an auto restoration place that had one like it, theirs was much lower rated though. From time to time I work in power plants, and those ones are huge for dismantling turbins and generators and lowering them down 4 stories in pieces. I too want a much smaller one that can handle a handful of tons for tractor work, pulling engines, whatever. Yours and your shop is a very nice setup. Thanks much for the photos. And, you do very good professional work.

Mark
 
Your pictures would have been good for a what welding processes/rods were used question. Kind of like Guido's tool challenges. My dad had cataract surgery and even got it on video. Takes about 30 seconds. He said it was like getting a new set of eyes. No blood either. You have to take drops for about a week afterwards but no big deal. Highly recommended. Dave
 

Mark that 80-Ton Safe Working Load beam I used for my span beam was a spreader beam used to handle pre-cast concrete panels for an air craft carrier pier I worked on. My granddaughter and I built that crane 10-years ago. I designed it, but had the head engineer of the engineering department of the company I worked for run the numbers for me. It's only rated at 1-ton, with a 5 to 1 safety factor.
I just had to laugh at my son-n-law the other day who lives right behind me, last spring he graduated from his rigging apprenticeship at the Trident Nuclear Submarine Base, he too asked if the crane would really pick 80-Tons!
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:lol:

Dave last year I had a little blow out with my wife's health care provider's eye doctor, he said I didn't qualify for cataract surgery yet! Right now I'm in a switch over mod with medicare A/B and me having to pay for my own insurance, once that's settled I'll go see another Doctor!
 
Yes. Or plate over the top and bottoms of the joint with a tringular plate. That way the top and bottoms of your rectangular tubing would share more of the load instead of having all the stress on the side that the tubing is welded to.
 
Looks good. I just might copy it and make one for my loader. Gotta pull the engine off the top of a combine this fall and the loader bucket won't quite reach far enough. Jim
 

Got the boom together enough this morning to give it a try. 13-feet 2-inches in height. I think this boom is going to work real well with my chain harrow!

Chainharrow.jpg




Added some more counterweight.
Extracounterweight.jpg
 
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