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Unread 01-18-2014, 04:42 PM   #1
hawkerxj
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2013 JK Wrangler 
 
Join Date: Jan 2014
Location: miramichi, NB
Posts: 1
JK Bumper Design/Build

I'm designing then fabbing a winch bumper for the front on my JK and am looking for some opinions on a few things.

The first is material, originally I was thinking of making it out of 1/4" mild steel(44w/a36) but it would be heavier than I wanted so I'm considering some higher strength materials. I was thinking 1/8" thick something in the range of 100ksi yield strength(Domex or weldox 100, or QT100). Has anyone worked with these materials. Any issues with welding them?

Second, consideration is the crash bar, to remove or not. My jeep is about 4 months old, full warrenty, but I never plan on taking it to the dealer unless there is a major issue. Would removing this void warrenty on bearings transmission engine ect? Mine is a Sport edition so I don't have the E-disco.

The third consideration is bolting it up. I like the look of bumpers with hidden fasteners but it would be a bit more complicated and would push the front end out a few more inches. The other option would be to make bolt on d-ring mounts for the end of the frame rail and sandwich the bumper in between. What looks better?

I started drawing this in Autodesk inventor, but since this my first post here, I can't post screen shots of what i have so far. Also I plan on mounting a winch down in between the frame rails.

Hawker

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Unread 01-18-2014, 09:59 PM   #2
AtTheHelm
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Join Date: Nov 2012
Location: South Lake Tahoe, CA
Posts: 762
What most everyone does is 1/4" for the winch plate and 3/16" for the 'skin', using plain ol A36 mild steel. A JK bumper wouldn't really be that big unless you're going crazy so I wouldn't be too concerned with weight.
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Unread 01-22-2014, 06:45 PM   #3
ravenworks
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2006 LJ Wrangler 
 
Join Date: Jul 2012
Location: NE, Ohio
Posts: 341
You could put 1x gusset underneath the winch plate to stiffen it.

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