THe NAC Lots-O-BFG KO2 Thread

[dukie564]

Re: THe NAC Lots-O-Post Thread

Agreed. I would not weld recovery point to the face of anything and expect them to hold. Cut slots and run them though, and weld front and back

 

[MoparManiac]

Re: THe NAC Lots-O-Post Thread

my front d-rings are surface welded. 1" plate.

I've done some damn hard pulls from them and they haven't even moved.

But I burned them on in 2 passes, heavily beveled, with my 211 maxed out.

 

[chedisme]

Re: THe NAC Lots-O-Post Thread

my front d-rings are surface welded. 1" plate.

I've done some damn hard pulls from them and they haven't even moved.

But I burned them on in 2 passes, heavily beveled, with my 211 maxed out.

way to be a bad example. people like you are the reason Travis had to put his rear bumper on backwards.





so Iv been flipping out looking for my 7/8 rod end inserts. getting all pissed off. then I realize I never ordered any cause I planed on reusing the ones I have. so there's an hour Ill never get back. plus the mess I now have to clean up. :flamemad:

 

[Dezzzy]

Re: THe NAC Lots-O-Post Thread

my front d-rings are surface welded. 1" plate.

I've done some damn hard pulls from them and they haven't even moved.

But I burned them on in 2 passes, heavily beveled, with my 211 maxed out.

Lets do math, 7018 welding rod: the "70" stands for 70,000psi tensile strength of the weld if done correctly (obviously we are all pro welders, also dont worry about the 18). estimate the surface area that you have welded on rectangles are LxW, just treaty every surface that the weld covers as a rectangle and add up the surface areas. say you had 4in^2 of surface area. 70,000=F/4, F=70000*4, F=210,000lbs. so if you had a weld that covered 4in^2 it would take 210,000 lbs to break it (straight pulling it). lets say a jeep weighs 3500 lbs, give the weld a safety factor of 12 for shock load 12*3500= 42000lbs so for straight pulling you have a design safety factor of 6. bending is a little different but still due able. not saying you should not do it through the bumper, just a interesting way of looking at it.

commence hating.

 

[squashman702]

Re: THe NAC Lots-O-Post Thread

Should be looking at 5k+ pounds for some of the Jeeps on here. My old ZJ was at 4280 on a truck scale with just a BB and 32's.

 

[chedisme]

Re: THe NAC Lots-O-Post Thread

Lets do math, 7018 welding rod: the "70" stands for 70,000psi tensile strength of the weld if done correctly (obviously we are all pro welders, also dont worry about the 18). estimate the surface area that you have welded on rectangles are LxW, just treaty every surface that the weld covers as a rectangle and add up the surface areas. say you had 4in^2 of surface area. 70,000=F/4, F=70000*4, F=210,000lbs. so if you had a weld that covered 4in^2 it would take 210,000 lbs to break it (straight pulling it). lets say a jeep weighs 3500 lbs, give the weld a safety factor of 12 for shock load 12*3500= 42000lbs so for straight pulling you have a design safety factor of 6. bending is a little different but still due able. not saying you should not do it through the bumper, just a interesting way of looking at it.

commence hating.

but but but infinite forces

plus thats the weld. what about the steel its being welded to? and was his wire 7018 rod?

 

[billyjp2]

Re: THe NAC Lots-O-Post Thread

Lets do math, 7018 welding rod: the "70" stands for 70,000psi tensile strength of the weld if done correctly (obviously we are all pro welders, also dont worry about the 18). estimate the surface area that you have welded on rectangles are LxW, just treaty every surface that the weld covers as a rectangle and add up the surface areas. say you had 4in^2 of surface area. 70,000=F/4, F=70000*4, F=210,000lbs. so if you had a weld that covered 4in^2 it would take 210,000 lbs to break it (straight pulling it). lets say a jeep weighs 3500 lbs, give the weld a safety factor of 12 for shock load 12*3500= 42000lbs so for straight pulling you have a design safety factor of 6. bending is a little different but still due able. not saying you should not do it through the bumper, just a interesting way of looking at it.

commence hating.

Go **** yourself dan

 

[billyjp2]

Re: THe NAC Lots-O-Post Thread

I just got a smart phone, how can I go about sending pics of my balls to carmelo and bob?

 

[squashman702]

Re: THe NAC Lots-O-Post Thread

I just got a smart phone, how can I go about sending pics of my balls to carmelo and bob?

What the ****? I can't picture you without a phone that doesn't flip open in some way.

And you have to download snapchat.

 

[CTeunuch]

Re: THe NAC Lots-O-Post Thread

Go **** yourself dan

x2

I just got a smart phone, how can I go about sending pics of my balls to carmelo and bob?

I don't know, but if pictures of your balls are in the mix, I'm getting a new phone.

 

[squashman702]

Re: THe NAC Lots-O-Post Thread

Also, I wants me one of these:

http://forums.bimmerforums.com/forum/showthread.php?1952158-1999-BMW-M3-w-5-3-LSx

 

[billyjp2]

Re: THe NAC Lots-O-Post Thread

i lost everyones phone numbers too

 

[Dezzzy]

Re: THe NAC Lots-O-Post Thread

Should be looking at 5k+ pounds for some of the Jeeps on here. My old ZJ was at 4280 on a truck scale with just a BB and 32's.

wiki says 3500 so **** you dave

 

[squashman702]

Re: THe NAC Lots-O-Post Thread

i lost everyones phone numbers too

I'll text you a dick pic. You'll know it's my phone number by how hard you have to squint.

 

[squashman702]

Re: THe NAC Lots-O-Post Thread

wiki says 3500 so **** you dave

. . . for a stock XJ, yeah.

 

[5spd_xj]

Re: THe NAC Lots-O-Post Thread

way to be a bad example. people like you are the reason Travis had to put his rear bumper on backwards.

:laugh: awesome

 

[ROBZ95Xj]

Re: THe NAC Lots-O-Post Thread

this is ****ing stupid, im working 8-430 on thursday, but they want me to come back and work 7-11 that night and wont let me stay through, what they **** am i to do for 2 1/2 hours, i wants the overtime dont these peaple relize that 42's are ****ing exspensive

 

[kastein]

Re: THe NAC Lots-O-Post Thread

I wouldn't surface weld any recovery point with a 140 amp welder or less.

In fact, I like to get the long tabs and have them go THROUGH the bumper, so I can weld on the inside and outside of the structure. Makes for a much stronger recovery point and side pulls are almost guaranteed not to wreak havoc on the face of the bumper.

Same. I don't trust my welding that much so I made mine from 1" plate, they are 7" long and go all the way through the bumper and are welded or bolted to the mounting brackets. Fronts are rosette welded and I beveled the shit out of the edges and then welded them up all the way around too. Rears are each held to the brackets with 4x 1/2" grade 8 bolts.

Basically I set mine up so that I'd trust them for the amount of tension I expected without the bumper beam itself even being there - all it does is keep side loading from bending the tabs or mounting brackets. The bumper beam attachment welds only have to handle me bashing it into rocks and whatever forces my winch can apply.

Lets do math, 7018 welding rod: the "70" stands for 70,000psi tensile strength of the weld if done correctly (obviously we are all pro welders, also dont worry about the 18). estimate the surface area that you have welded on rectangles are LxW, just treaty every surface that the weld covers as a rectangle and add up the surface areas. say you had 4in^2 of surface area. 70,000=F/4, F=70000*4, F=210,000lbs. so if you had a weld that covered 4in^2 it would take 210,000 lbs to break it (straight pulling it). lets say a jeep weighs 3500 lbs, give the weld a safety factor of 12 for shock load 12*3500= 42000lbs so for straight pulling you have a design safety factor of 6. bending is a little different but still due able. not saying you should not do it through the bumper, just a interesting way of looking at it.

commence hating.

'bout time someone else throws around some meaningless theoretical numbers and gets shit on for it :spin1:

Unless the back of the D-ring tab is completely beveled to a chisel point and you get 100% penetration, you are never gonna get 4 square inches of weld cross section, probably more like a 1/4" to 3/8" cross section all the way around the perimeter.

90% of us probably made our bumpers with ER70-6S or similar MIG or fluxcore wire, not a 7018 stick. Hell, I can't stick weld to save my ****ing life.

wiki says 3500 so **** you dave

My MJ weighs in at 4200 with literally nothing in the bed and me in the drivers seat, so figure 4000 empty. And I'm on stock axles basically with minimal suspension upgrades and no undercarriage armor.

 

[MoparManiac]

Re: THe NAC Lots-O-Post Thread

Unless the back of the D-ring tab is completely beveled to a chisel point and you get 100% penetration, you are never gonna get 4 square inches of weld cross section, probably more like a 1/4" to 3/8" cross section all the way around the perimeter.

90% of us probably made our bumpers with ER70-6S or similar MIG or fluxcore wire, not a 7018 stick. Hell, I can't stick weld to save my ****ing life.

Yeah I probably have about 3/8-1/2" cross section all the way around. 6" long on both sides and obviously 1" top and bottom. I beveled it down to about 3/8-1/2" from 1". My 211 has no problem welding that (cranked all the way up).

Actually...just doing some quick math if that IS 1/2" all the way around then it actually is 4 square inches of weld surface area :laugh:

I hacked up some floors last night. They cover 90% of the large openings (some small 1" gaps here and there where I didn't want to spend an extra 2 hours on) so I'm guessing it will pass tech.

Gotta pick up a rear facing amber light as well. Just grab a cheapy fog light from Walmart or something.

 

[asp]

Re: THe NAC Lots-O-Post Thread

I made coffee and left it on the counter at home. It's going to be that kind of day, I can feel it.