Jack stands

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Spent last weekend under cheap a** jack stands pulling a new brake line in.  Decided I wanted something more beefy.  Just got a new plasma cutter so figured the bases had to take advantage of that  Attached Images
Reply:Your braver than I am! I wouldn't trust all-thread in an application like this; no way no how. Jack stands have to be tested, should one fail and if you happen to live through it you'll be DUELY compensated.Late to bed, and early to rise. Fish like hell so I don't have to make up lies. Syncrowave 200MM211 & Spoolmate 100
Reply:Looks hell for stout to me!  A buddy and I made a tall set out of 2 inch pipe just leaned together like a pyramid welded with a 130 amp mig and absolutely no welding experience and they are still in use today....12 years later.
Reply:2 inch pipe and 3/4, 7/8, or even one inch all-thread are worlds apart. Lawn tractor for changing or sharpening blades sure no sweat. Compact, mid, or full size vehicle. Yeah I'll pass! Late to bed, and early to rise. Fish like hell so I don't have to make up lies. Syncrowave 200MM211 & Spoolmate 100
Reply:How many guys slide under cheap, stamped,  HF made in china stands without giving it a second thought?This one has to be better than that! Its hard to get a sense of scale in the pic, but it looks to be at least 1" all thread. Maybe 1.5?
Reply:I think the diameter of the all thread is irrelevant. All the weight of a vehicle being supported by nothing but threads?  No thanks. They would make great axle stands or something similar. The welding and fab on them is pretty damn nice, to my layman's eye.  They will work perfectly. Until they don't.Last edited by mtrcyclecop; 08-05-2013 at 11:32 PM.
Reply:Well, they look pretty stout but I'm pretty sure I'll never climb under ANYTHING that's supported by something I welded!!!
Reply:All thread is stouter than people think. I work with it all the time in the construction industry and it still surprises me
Reply:sand_man_redOmitting the minor flaws . . . . . . 3 point stands are for fabrication, 4 point stands are automotive, Who builds your favorite helmet?Opus
Reply:I'm almost certain those don't have the necessary strength for the given application; nor engineered for such. More so on ground or concrete that's not level. Purpose built threaded stands vs something cobbled up out of normal hardware or fastener store parts is recipe for disaster in this instance. Just my opinion and it's not my measly life at risk. The stands themselves look as though they could be up to the task, but the all-thread I wouldn't trust my life with. I'll stick with my Craftsman 2 & 3 ton stands, thanks.Late to bed, and early to rise. Fish like hell so I don't have to make up lies. Syncrowave 200MM211 & Spoolmate 100
Reply:Pretty slick looking design. Nice wide base. Proof is in the function I suppose. Is that 3/4-10 in the picture?  Or is it an inch? I know a grade 5 coupler nut 3/4-10 is rated for something like 22,000 psi straight pull out, 90,000 psi yield. No worries on the thread. Acme thread would be even better of course. Bending of the all-thread is another issue, a 6" length with 250lbs perpendicular will bend it. Inch will yield similarly at 600lbs. It just isn't bend resistant. What grade is the all-thread? How high do you plan on extending the thread?  I'd be leery extending more than few inches without doing some testing.Last edited by forhire; 08-06-2013 at 03:20 AM.
Reply:Originally Posted by forhirePretty slick looking design. Nice wide base. Proof is in the function I suppose. Is that 3/4-10 in the picture?  Or is it an inch? I know a grade 5 coupler nut 3/4-10 is rated for something like 22,000 psi straight pull out, 90,000 psi yield. No worries on the thread. Acme thread would be even better of course. Bending of the all-thread is another issue, a 6" length with 250lbs perpendicular will bend it. Inch will yield similarly at 600lbs. It just isn't bend resistant. What grade is the all-thread? How high do you plan on extending the thread?  I'd be leery extending more than few inches without doing some testing.
Reply:Originally Posted by mtrcyclecop All the weight of a vehicle being supported by nothing but threads?  No thanks.
Reply:Originally Posted by sand_man_red...tag saying 12,000 pound safe working load which I assume means in tension
Reply:Originally Posted by AntiblingYou must be afraid to go in steel frame buildings then too. Sent from my SCH-I535 using Tapatalk 2
Reply:Originally Posted by jamesyarbroughAny commercial building for that matter. When you move the ceiling tiles you will see everything is hanging on all thread! 8 inch chilller pipes full of water...hanging on 1/2 inch all thread!
Reply:Originally Posted by jamesyarbroughAny commercial building for that matter. When you move the ceiling tiles you will see everything is hanging on all thread! 8 inch chilller pipes full of water...hanging on 1/2 inch all thread!
Reply:There are some heavy duty screw type stands out there, but I didn't trust them.http://www.toolsource.com/screw-type...-p-104379.htmlI prefer a pinned, or ratchet type, stand.  It's safer in my opinion.  At least for my applications.  The thick cross section resists twisting/bending better than anything out there.  And the extra wide base keeps it all upright even on slightly uneven ground.While buildings are indeed supported by screw jacks, they tend to be a static load (maybe not so static out in California).  Vehicles have a frightening tendency to shift.Once I have something up on stands I try to knock it off REALLY.  I push against it to see how stable it is.  If satisfied I will crawl underneath, but still really don't feel 100% comfortable."Any day above ground is a good day"http://www.farmersamm.com/
Reply:Sam - I too shake the heck out of a vehicle before I will roll under it I show my kids that too - and tell them why.When I was young and less experienced, I've been under two vehicles that shifted and fell - I was rolling out the side as they came down....Dave J.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:I picked up an old set of jack stands that are the pin type, they appear as though they were meant for a 70's Honda Civic; thin wall tubing, split into thirds and then bent until they're stands with steel strap welded to the ends.   Goes to show some things used to be a lot more crappy than even stuff now!  Screw jacks can be plenty stout and were once made out of wood.  They've pretty much been replaced though by hydraulic bottle jacks.  One thing I'd like to see for jack stands is a flat base, they tend to sink into asphalt after a while like a cookie cutter.  Nothing a piece of plywood won't fix though.
Reply:Originally Posted by pedaldudeOne thing I'd like to see for jack stands is a flat base, they tend to sink into asphalt after a while like a cookie cutter.  Nothing a piece of plywood won't fix though.
Reply:I've used all sorts of stuff as jack stands, from stacked bricks to just a highlift jack. some times you do what you gotta do. but one thing I do do is I never get into a possition where if the vehicle were to shift I would get stuck, pinned, or crushed. leave tires on. never lift high enough that you're sitting under the vehicle. Never go under a vehicle that isn't properly supported if you can't fit under it on the ground. most of my questionable work has been under 4wd trucks that if they fell I'd still have clearance while on the creeper. But I wasn't opposed to crawling around on the ground either.will these work? more than likely. Would I build them for my own use? probably not. I prefer the pin/rachet style stands myself. but toeach their own. I'm sure they'd be great for axle stands and material supports though.There are no problems. There are only solutions. It's your duty to determine the right one.Hobart Handler 210Airco 225 Amp MSM Stinger
Reply:Just because it has a label slapped on it and fancy paint doesn't mean that its any better. I own some Summner jack stands and I was looking at the welds on it. Looks like 8 cans of shark ****. Only difference is that his is not approved by osha/ansi. And the all thread connected to the head only has room for 3' pipe max. Unless hes building a superstructure I doubt there is going to be any harm done. Whats the height about 2ft? There are no laws on making lifts and stands for your own projects. On a jobsite, that's a diff. story. Good craftsmanship. Keep up the good work.
Reply:Great job on that!PlasmaCam CNC cutterLathe and Band SawClamps
Reply:I built some stands that are similar but simpler to lift my 2.5-ton boat off the trailer for painting. I used 3/4" and 1" black iron pipe for the frames and used Acme-threaded rods and nuts for the screw part. They work fine – and in fact this is how Brownell's boat stands are made.whats the length of the allthread?
Reply:Originally Posted by forhirePretty slick looking design. Nice wide base. Proof is in the function I suppose. Is that 3/4-10 in the picture?  Or is it an inch? I know a grade 5 coupler nut 3/4-10 is rated for something like 22,000 psi straight pull out, 90,000 psi yield. No worries on the thread. Acme thread would be even better of course. Bending of the all-thread is another issue, a 6" length with 250lbs perpendicular will bend it. Inch will yield similarly at 600lbs. It just isn't bend resistant. What grade is the all-thread? How high do you plan on extending the thread?  I'd be leery extending more than few inches without doing some testing.
Reply:Originally Posted by OPUS FERROsand_man_red. 3 point stands are for fabrication, 4 point stands are automotive, Opus
Reply:You guys are extremely concerned with side loads and tipping. Yall all live on hills or something? I try to jack my cars up on concrete slabs that are nice and level when I work on them.
Reply:When it comes to jack stands I go way overboard. I have heard to many stories of people getting hurt an sometimes killed to risk it. That's why I go above an beyond what's required.PROUD   AMERICAN
Reply:Thanks for the comments.Good point on the spacer on the open threads, It would help with any doubts on the thread and would add resistance to bending too if I jam the nut on the bottom up tight to the guide pipe.They are about 11-16 inches tall and about 13.5 inches from corner to corner on the triangular footprint.  The all thread is about 11 inches over all.  There's a nut on the bottom to keep it from coming out and the nut on the cradle leaving about 9 inches of thread, the pipe it rides in is 4 inches long leaving about 5 inches for travel.  I agree with the concerns about extending too far with a heavy load.  I will see how they feel after following your suggestions on bump testing the supported car to check for stability and trim the screws to a safe limit.For what it's worth this is picture of what I was trying to improve on.  I like the stability of the 3 point base as my floor is a bit uneven and it's all concrete so I don't have to worry about sinking into asphalt. Attached Images
Reply:WHAT? common sense on the internet? Surely you jest. lol
Reply:Funny coming across this thread.My 6 ton HF jack stands are now too small for my jeep.Ibwas just thinking about using 2x2 angle and some flat bar to extend them up about 4-6"
Reply:Originally Posted by jamesyarbroughAny commercial building for that matter. When you move the ceiling tiles you will see everything is hanging on all thread! 8 inch chilller pipes full of water...hanging on 1/2 inch all thread!
Reply:Originally Posted by pepiTotally agree with that statement, 3 point will tip,
Reply:Originally Posted by Mick120Let common sense prevail....
Reply:Originally Posted by weldbeadif thats true i bet the hangers were about 3 feet apart... as  i recall 8" pipe would take at least 3/4" rod, max spacing maybe 10 feet..