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Thread: XJ Sheet steel bumper

  1. #1
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    XJ Sheet steel bumper

    Built up this bumper for a friend, after seeing the response to the other bumper posts figured some of you guys would want to see this.

    Here is what it started as
    Attached Thumbnails Attached Thumbnails Bumper in pieces 1.JPG  
    95 ZJ 5.2L, Custom long arm 4 link Rear 3 link panhard front. D44/9" 4.88's locked and spooled,37x12.5 MTRs, 1 ton steering, Currently bumperless but rolling.

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    more
    Attached Thumbnails Attached Thumbnails Bumper in pieces 2.JPG  

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    assembled
    Attached Thumbnails Attached Thumbnails Bumper in pieces 5.JPG   Bumper in pieces 4.JPG  

  4. #4
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    mounted and winched
    Attached Thumbnails Attached Thumbnails bumper complete installed 3.JPG   bumper complete installed 4.JPG  

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    still needs to be finished welded, but almost there, have to do that tonight
    Attached Thumbnails Attached Thumbnails bumper complete installed 1.JPG   bumper complete installed 2.JPG  

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    let the flaming commence

    let me know what you guys think, the owner likes it, he didnt have to cut anything but it is very close to the grill (read: just touching)

    about that time

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    How thick is the steel you used?

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    That did take long to get a response. He made this bumper for my jeep.
    this was the "prototype" bumper for this design. the top shelf and front formed pieces are 1/8" but will be 3/16" in the future. the frame rail mounts and all bracing on the inside including the winch plate are 1/4".

    marcus
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  9. #9
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    i cant even eat dinner without you hijaking my thread eh marcus



    I'm going to burn that sucker shut now, we will see how much stronger it becomes all sealed up.

    I actually could make both versions, one out of 1/8 for the people looking to stay light (read : 86 lbs)

    and one of the heavier stuff prob over 100 lbs easy.

    we will see

    Bradford

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    Nice work

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    looks very nice...how much dough would you make a replica for?
    S.S.O
    OF4WD#4900

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    Looks nice, basically like mine, just more finished, but 1/8 seams a little thin to me for a winch bumper with recovery points on it. How is it reinforced?

    Other then that, clean quality work!! Nice detail in all cut pieces.
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    I prefer to build it and not buy it, you see it, I probably made it.

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    looking good but I wouldn't go with less then 3/4" plate for the frame/recovery points and 1/4" (min) plate for the rest, with a bent plate or channel design for the main winch support.
    Also nice job on the cutting but I think you have cut out more material then necessary with out adding any reinforcing.
    Good luck and don't take this personally... just some constructive criticism
    S.S.O.
    OF4WD

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    I take everything heading my was as information, and constructive criticism.

    Opinion is what makes the world go around.

    I personally do not see a reason for the 3/4in plate for the frame/recovery points considering that the frame rails on a cherokee are only stamped steel, either single or multi layer at some points.

    The bumper is held on with 6 bolts on the steering box side, and 5 bolts on the pass side. 3 bolts pass all the way through the frame rails at the steering box and then the three stock bumper bolts. On the passenger side there are the 3 stock bumper bolts and then 2 others that pass through the frame that are bolted on the inside.

    Some of the material that you see cut out is there to keep the bumper light, and to have it fail when you get in a car accident or hit a tree traveling at a high rate of speed so that the bumper fails and not the frame rails. If i made it all solid there would be no deformation and who ever got hit with the bumper in an accident would get impailed by the two mounting brackets.

    for JKmotorsports -> In one of the first pictures you can see that the mounting brackets at the frame extend all the way to the recovery points so it is one complete unit, the 1/8in does not hold the force of the pull point, it only adds to it and is mainly there for grinding off stuff and protecting the winch, the 1/4" frame bracket was designed to hold all the force and then the winch plate was designed to tie the two sides together.

    Any more comments or suggestions please let me know,

    side note, the next bumper will prob be made with 1/4" and 3/16, instead of 1/8, this was a prototype.

    In all honesty I would like to hook up an 8000lb winch with a snatch block coming back to the rig, put it up against a tree and snatch it off of another tree and see if the winch will stall before the bumper will fail. There is a safety factor built into the bumper but real world, is real world.



    Bradford
    Last edited by Black88YJ; 03-08-2008 at 12:57 PM.

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    you also cannot see that the eyelets are doubled up with another piece of 1/4 where it extends up from the bumper.

    all that plus this is a functional bumper for the weight it is. If i design one from 1/4 it would be indestructable but also like 200lbs.

    Tradeoffs always have to be made somewhere.

    Bradford

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    perfect just perfect

    thats coming from a mechanical designer that understands strength and thickness are not dependent.
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    3/4 is just retarded heavy for no reason, 3/16 is plenty for most of it except the winch mount and shackle mounts.
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  18. #18
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    That is my opinion on the thickness matter.

    thanks for you input.


  19. #19
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    Quote Originally Posted by Black88YJ View Post
    you also cannot see that the eyelets are doubled up with another piece of 1/4 where it extends up from the bumper.

    all that plus this is a functional bumper for the weight it is. If i design one from 1/4 it would be indestructable but also like 200lbs.

    Tradeoffs always have to be made somewhere.

    Bradford
    No your right I couldn't see that the recovery points were doubled up...

    the idea of cutting out the steel to make crumple zones, is a good idea for a DD and never thought of it.

    your right there are tradeoffs to be made somewhere... I just like to make things indestructible

  20. #20
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    Well I think it looks good.....and thats all that should matter for I am Tugger lol


    sorry....but I like it

    good job and well thought out by the looks/ sounds of it
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