$100.00 Rear Bumper

Israel

NAXJA Forum User
There are a lot of different threads on bumper builds on NAXJA providing almost as many variations of what can be done. To give back to the NAXJA community, here is my version of a rear bumper.


Part 1: Materials

(1) length of 2”x5” pipe 3/16” thick and 66” long
(2) lengths of 2”x5” pipe 3/16” thick and 19” long
(2) lengths of 2”x3” pipe ¼” thick and 6.5” long
(2) lengths of 2” flat bar ¼” thick and 17” long
(2) lengths of 4” flat bar ¼” thick and 13.5” long
Various lengths of flat bar to cover the ends of the pipe.

The total for all the steel came to $96.87. If I had been thinking, I would have just ordered my 2”x5” pipe 104” long, my 2”x3” pipe 13” long, my 2” bar 34” long and my 4” bar 27” long since as I found out later, they charge per cut and I have access to a horizontal band saw. The total cost would have been closer to 80.00. Oh, well.

Here is a pic of the main bumper piece. It is 66” long. The tapers at the ends were done by measuring 12” from the ends and 1.75” down from the top and drawing a line between the two. I made the cuts with a die grinder with a cut off blade on it. Both sides took about 15 minutes to cut. The hole through the center was done by tracing the outline of the receiver in the center of the bumper and then drilling a ½” hole at each corner of the tracing. I then connected the holes with the die grinder and cut off blade. The receiver will go through the bumper sticking about 2” out from the face of the bumper and be welded on both sides.
Mainbumperpiece.jpg


These are the two side pieces. They have a 15* cut on the end that will be in the wheel well and a 2” recess cut on the other end to fit on top of the main bumper piece.
Sidepieces.jpg


These are the brackets that will bolt to the stock 8 mount holes. I will be drilling an additional 4 holes per bracket on the corners just for some extra beef. I believe I drilled the holes with a ½” drill bit which will allow some adjustment when bolting the bumper on.
Bumpermountbrackets.jpg


Here are the two bumper spacers. I want the bumper to almost be flush with the hatch so I cut the body of the spacers to be 2.5”. This will put the face of the bumper about ½” out from the hatch. As you can see, I cut off three sides of the remaining material to make 4” long tabs. I’m going to cut a pair of slots in the bumper which they will be inserted through and stick 2” out from the front of the bumper. Then I’ll weld two ¼” pieces to the sides of the tabs and drill a 15/16” hole through the three pieces to make a pair of D-ring shackle hangers. The thought is that any pull forces on the D-rings will be directed through the bumper to the mount plates and frame rail strips instead of to the bumper, then to the spacers and mount plates.
Bumperspacers.jpg


Frame rail strips. They will be drilled for the 3 holes each as the bumper is being assembled. In all, the bumper will be held to the Jeep with 22 bolts.
Framerailpieces.jpg
 
Last edited:
Part 2: Assembly

The stock holes that access the inside of the frame rail are oval and spaced up from the inside bottom of the frame rail. Using a reciprocating saw, I cut the material out from below the oval so that the frame rail strips can sit flush with the inside bottom of the frame rails.
widenedhole.jpg


Here the brackets and frame rail strips are being bolted to the Jeep. The additional 4 holes per side can be drilled through the brackets and the body of the Jeep at this point, although I still haven‘t gotten around to it. The frame rail strips should be spaced out the same distance from the brackets as your spacers, 2.5” in my case. Yes, the hitch will be coming off before the bumper is done.
Bracketassembly.jpg


The spacers go next and the assembly is welded.
BracketsWelded.jpg

WeldingBumperSupports.jpg


Next, we welded the hitch in the center of the bumper as well as some 2” flat bar to the ends of the main bumper piece. Just for kicks, I used some of the extra steel from the tapers I put on the ends of the main bumper piece to brace the back of the receiver. Mmm.. Beefy!
BracingWelded.jpg

EndsCapped.jpg


Slots were then cut through the bumper by drilling the top and bottom of the slot and slicing a thin piece of metal out wide enough for the spacer tabs to slide through. The bumper was then placed onto the spacer tabs which are bolted to the Jeep. The ¼” plates were added to the sides of the tabs to make a ¾” thick tab for my D-ring shackles and the tabs were welded to the bumper.
BumperFitted.jpg


The two side pieces were then fitted and spot welded in place and the whole assembly was unbolted to be finish welded on the bench. The rest of the pipe ends were also capped at this time.
D-RingTabs.jpg

WeldingBracketstoBumper.jpg


Here is a picture of the complete bumper bolted temporarily back to the Jeep for the trip home where it would be painted.
WeldingComplete.jpg
 
Part 3: Completion

Here are a few miscellaneous pictures of the painting process and the finished bolted to the jeep.

ReadyForPaint.jpg

BumperPrimered.jpg

BumperPainted.jpg

Completebumper.jpg

Clearancewithnewbumper.jpg
 
Good work and pics! I definitly need to make some bumpers! You may have just bumped them up on my to do list :).

Looks like you could use more tire to go with those TJ flares though :).
 
very cool... i guess with that design you have to tuck the rear quarter panels...what was your method in doing so? i am ok with a welder but i have seen some people tuck and tack with pop rivets... i am doing this soon so i want to do it right. thanks. oh yeah thats awesome work by the way...bumpers like that that come with integrated hitch from tomken or another brand run up to 300 to 350... cool work
 
TRAILREADYXJ said:
Good work and pics! I definitly need to make some bumpers! You may have just bumped them up on my to do list :).

Looks like you could use more tire to go with those TJ flares though :).

Yeah, 35s are in process right now.
 
aparke4 said:
very cool... i guess with that design you have to tuck the rear quarter panels...what was your method in doing so? i am ok with a welder but i have seen some people tuck and tack with pop rivets... i am doing this soon so i want to do it right. thanks. oh yeah thats awesome work by the way...bumpers like that that come with integrated hitch from tomken or another brand run up to 300 to 350... cool work

The quarter panels turned out kind of hacked so I wouldn't suggest copying what I did. If I could do it again, I'd fold where everyone else does instead of higher. I think it would have come out cleaner.
 
Access to the bolts must be fun.Mine is so tight to the body that I sleeved mine so I can get straight at them with a rachet.
rear%20bump1.jpg
 
RCP Phx said:
Access to the bolts must be fun.Mine is so tight to the body that I sleeved mine so I can get straight at them with a rachet.

It actually isn't too bad once you get the bolt started. I didn't plan for it, but there is just enough room for me to get my 3/8ths ratchet with a short socket in there. If I had mounted it any closer, I would have had to cut the sheet metal below the brackets to get to the bolts. At any rate, it isn't meant to be taken on an off regularly anyway, right?
 
Nice job, however I have some food for thought. you stated that it was attached to the jeep with 22 bolts, however when you use your hitch to pull you are pulling off of 1 pin that is a total of 1/2" thick. Oh and when you load your jeep on a trailer behind your tow rig you haul 6000# off of that same 1/2 pin....I think We (including me) over bolt a lot of parts...I guess more is better than less..

Once again nice job, I like how it looks.
J:cool:
 
STEELFISH said:
Nice job, however I have some food for thought. you stated that it was attached to the jeep with 22 bolts, however when you use your hitch to pull you are pulling off of 1 pin that is a total of 1/2" thick. Oh and when you load your jeep on a trailer behind your tow rig you haul 6000# off of that same 1/2 pin....I think We (including me) over bolt a lot of parts...I guess more is better than less..

Once again nice job, I like how it looks.
J:cool:


Good point. But as you say, more is better than less. I'd hate to be the guy who's bumper was ripped off while strapping some one out! :wow: :doh:
 
That turned out real nice.
 
STEELFISH said:
Nice job, however I have some food for thought. you stated that it was attached to the jeep with 22 bolts.J:cool:
Dang, mines only got 18.:banghead: Looks real good.:clap::yelclap: JIM.
 
STEELFISH said:
Nice job, however I have some food for thought. you stated that it was attached to the jeep with 22 bolts, however when you use your hitch to pull you are pulling off of 1 pin that is a total of 1/2" thick. Oh and when you load your jeep on a trailer behind your tow rig you haul 6000# off of that same 1/2 pin....I think We (including me) over bolt a lot of parts...I guess more is better than less..

Once again nice job, I like how it looks.
J:cool:
i think the difference there is that the 1/2" pin goes through a suitably large piece of metal, and the bumper is bolting into sheetmetal. If you didn't spread the load out you'd just pull the bolts out of the sheetmetal and make a jolly mess.
 
87manche said:
i think the difference there is that the 1/2" pin goes through a suitably large piece of metal, and the bumper is bolting into sheetmetal. If you didn't spread the load out you'd just pull the bolts out of the sheetmetal and make a jolly mess.
I like your bumper MUCH better.
Who says parts have to look good, am I right?
 
OT said:
I like your bumper MUCH better.
Who says parts have to look good, am I right?
well, you're the man who would know :)
I thought having crappy looking parts on your rig was an MWC requirement.
 
another important thing to remeber about all the bolts is that this bumper is designed for recovery as well, as mentioned, which can be more force than a trailer rolling on (ideally) properly inflated tires.
 
Back
Top