New Design of Bumper

[4x4Dalton]

Hey guys. Here is a drawing of a bumper I am tryin to design. Now yall be honest with me I can take it.:D
http://lh4.ggpht.com/_BalGd56uEqU/TSDD5WMaGTI/AAAAAAAAAf8/ThQtPDFBp4s/0102111315%20%284%29.jpg
http://lh6.ggpht.com/_BalGd56uEqU/TSDTvrv71YI/AAAAAAAAAgM/bftTqUyoU0E/0102111433.jpg

Now tell me what yall think.

[FunkSkunk]

what is it going on?

[4x4Dalton]

My 95 XJ.

[bigjim350]

Not sure what the dimensions are on it, but it looks pretty big from the front. Looks like it would hurt your approach angle, and get caught up on stuff offroad.

[cantab27]

he dont go off road jim ....lol

[Tural]

that's a good start.

[Tural]

here's your bumper
http://www.xjtalk.com/picture.php?albumid=223&pictureid=1960
http://www.xjtalk.com/picture.php?albumid=223&pictureid=1959

[4x4Dalton]

Looks cool thanks Tural.:thumbsup:

[Tural]

here's your basic dimensions
http://i1202.photobucket.com/albums/bb378/XJTural/bearsbumper4.jpg?t=1294014797
http://i1202.photobucket.com/albums/bb378/XJTural/bearsbumper3.jpg?t=1294014797

[Punisher]

here's your basic dimensions
http://i1202.photobucket.com/albums/bb378/XJTural/bearsbumper4.jpg?t=1294014797
http://i1202.photobucket.com/albums/bb378/XJTural/bearsbumper3.jpg?t=1294014797

DAMN Tural!!!
what program you have there? I'd LOVE to have that...

[bluedragon436]

Bumper looks good Bear... Looks even better in Tural's layout!!

[modestmar00xj]

yeah that looks pritty cool! to get the full idea i would have to see it when its built! good work.

[4x4Dalton]

Figured today with the square footage with 1/4 steel it would weigh about 120lbs.

[Tural]

with a full body 1/4" steel it will probably weigh more than that.

[jdougn]

My .o2 is that front to back, and top to bottom you are considerably larger than needed. Run some rough dimensions on bumpers that you like the look of and they are probably smaller than that. Personally, I think that overall scale of bumper looks like it was designed for a much larger vehicle.

But you are working with some good ideas. I like the general angles including the angled corners. The winch tray looks good too. Of course, anchor points are essential and you have those in place. I think the design just needs some fine tuning. Maybe try roughing a full scale design from cardboard to see how it actually looks on your XJ?

[BrianXJ]

thats awesome built it and I will drive to VA to pick it up in my Dino-Jeep

[Tural]

i threw a 1x1 piece of 1/8" on the scale today at work and it came to roughly 4.5lbs. it's probably safe to assume that a 1/4" 1x1 will weigh around 9 lbs. so, if i get a chance, i'll measure out your bumper's overall surface dimensions and let you know how much it will weigh roughtly.

[PolarXJ]

It looks good, you can cut some weight by making the depth smaller. Like 4 to 6 inches. But if you are going for that look, great. :thumbsup: I'm not a big fan of the bigger bumpers, kinda like the arb ones.

[Mudderoy]

It looks good, you can cut some weight by making the depth smaller. Like 4 to 6 inches. But if you are going for that look, great. :thumbsup: I'm not a big fan of the bigger bumpers, kinda like the arb ones.

I started my bumper like this but Spanky told me a few things. I think my original design was cut down to 7" sticking out front and it was made much more vertically narrower for the approach angle.

[4x4Dalton]

Thanks everyone for the feedback on this. I will sit down this weekend and possibly do some mods to the design like makin it shallower and possibly raising the height of it to about 7 1/2. If this design works out and all I am definitely going to get it made for mine. Again thanks for all the feedback,keep it comin.
Bear

[LizardRunner]

ah yes grasshopper, first define the needs, the rest will follow.

[4.3LXJ]

Dalton

It may have been said before, but with the exception of the winch plate, you might be better off with 3"16" plate. The way you have it designed, that will be plenty strong. One thing to consider is what you are attaching it to. If you hit something on the corner, you want it to protect, but not be so tough it takes out your sub frame. The bumper is much easier to repair.

[LizardRunner]

Ok Bear, I got into my metal books to give you some thickness facts to work with. I really like folks that want to roll their own :)

1/4" is 3 gauge steel, this weight is 10 lb. per sq. ft.

4 gauge or 15/64" (.265625) weight is9.375 lb. per sq. ft.

3/16 or 7 gauge (.1875) weight is 4.7625 lb per sq. ft.

for comparison I measured the steel on a 63 chevy bumper (one of the strongest I have ever encountered)
It's 9 gauge or 5/32" (.15625) weigth is 6.25 lb per sq. ft.

now depending on your overkill likings, you should be able to determine just how thick you want to make your new bumper.

Note: the ones I will be building for the Lizard will have .25 standards attaching to the "frame" rails as far back as I can go, these standards will end in the clevis mounting rings (through frame construction) I have a new autocad program and will draw up what I am talking about here to post or at least email you the drawings complete with thicknesses. with my auto cad program I can also do stress testing and will add those when I get them completed for you to have also.

[jdougn]

Ok Bear, I got into my metal books to give you some thickness facts to work with. I really like folks that want to roll their own :)

1/4" is 3 gauge steel, this weight is 10 lb. per sq. ft.

4 gauge or 15/64" (.265625) weight is9.375 lb. per sq. ft.

3/16 or 7 gauge (.1875) weight is 4.7625 lb per sq. ft.

for comparison I measured the steel on a 63 chevy bumper (one of the strongest I have ever encountered)
It's 9 gauge or 5/32" (.15625) weigth is 6.25 lb per sq. ft.

now depending on your overkill likings, you should be able to determine just how thick you want to make your new bumper.

Note: the ones I will be building for the Lizard will have .25 standards attaching to the "frame" rails as far back as I can go, these standards will end in the clevis mounting rings (through frame construction) I have a new autocad program and will draw up what I am talking about here to post or at least email you the drawings complete with thicknesses. with my auto cad program I can also do stress testing and will add those when I get them completed for you to have also.

Hmm....
Great information, but somethings not quite right here.
If 1/4" steel is 10 lb per sq ft then 3/16" steel shouldn't weigh less than half that per sq ft. Especially since 5/32" is thinner then 3/16" but is listed as weighing more. Did some numbers get transposed on the 3/16" weight?

I built my winch bumper out of 3/16" thick and it's done fine. Slammed some big rocks and have put over 10,000 lbs of force on it with no problems. I think the XJ will give up before the bumper does.

Respectfully,
Doug

[LizardRunner]

checked by highlighting

ga. | Frac.Inch | dec.Inch | Lb/ft2

3 | 1/4 | .25 | 4.536
4 | 15/64 | .234375 | 9.375
5 | 7/32 | .21875 | 8.75
6 | 13/64 | .203125 | 8.125
7 | 3/16 | .1875 | 7.5
8 | 11/64 | .171875 | 6.875
9 | 5/32 | .15625 | 6.25
10 | 9/64 | .140625 | 5.625
11 | 1/8 | .125 | 2.268

source: Standard Guage for Sheet Metal and Plate Iron and Steel, Sec. 206 US Standards Code. 2009

Help I need new glasses! obviously I couldn't see straight lines the first time.

3/16 is plenty thick for any bumper. If you used oval tube (rectangular tube)

http://www.xjtalk.com/picture.php?pictureid=1988&albumid=232&dl=1295029705&thumb=1 This is a winch bumper rect. tubing (2x6) standing on end. note open top which doesn't need to be filled with a heavy steel (this one has an aluminum top plate duz fastened to cover the opening and most of the winch. it has even been lightened with radiused holes (the top plate I mean). This keeps the overall weight down even further than most but is still exremely strong.