Steel thickness ? for custom skid plate - JeepForum.com
 
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post #1 of 14 Old 02-02-2010, 02:26 PM Thread Starter
motiv8ya
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Steel thickness ? for custom skid plate

I'm looking to make a flat skid plate / crossmember for my current CJ7 build and I need advice on what kind of steel to use (tubing round or square, wall thickness etc). I am brand new to welding and have only built a stand for my blasting cabinet and a welding cart so far (I used 1 inch square tubing 1/8 inch wall for both and I still have over 40 feet of it laying around). If you've built your own what materials did you use and what's too light weight for this application, thanks.

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post #2 of 14 Old 02-02-2010, 03:45 PM
BESRK
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For my CJ5, I used 1.75"x.120" wall DOM for the framework and skinned it with 3/16" thick mild steel plate.

'80 CJ5 w/AMC360, T176, D44 w/Detroit 4.56, RE 4" YJ lift and 35s..


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post #3 of 14 Old 02-02-2010, 03:58 PM Thread Starter
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Thanks BESRK. Would the 1 inch square x 1/8 wall steel that I have be strong enough or should I stay away from using it?

Last edited by motiv8ya; 02-02-2010 at 04:24 PM.
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post #4 of 14 Old 02-02-2010, 06:48 PM
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its hard to say what kinds of loads that the mount would experience due to torque and weight but that seems pretty small to use there to me.
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post #5 of 14 Old 02-02-2010, 07:01 PM
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that depends a lot on how hard ur gonna hit what ur gonna hit
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post #6 of 14 Old 02-02-2010, 07:36 PM
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Quote:
Originally Posted by motiv8ya View Post
Thanks BESRK. Would the 1 inch square x 1/8 wall steel that I have be strong enough or should I stay away from using it?
What Besrk used is a little bigger in diameter but 1/8" is .120 for the thickness.
I would use it, it is pretty strong stuff, the worse that can happen is you bend it, well you hit anything on the Jeep hard enough and your gonna bend something.
I have built several things out of that 1" square tube, it is great for lots of projects.
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post #7 of 14 Old 02-03-2010, 05:28 PM Thread Starter
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post #8 of 14 Old 02-03-2010, 05:33 PM
BESRK
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Honestly, 1" square is a bit too small for my taste. If I were going to make skidplate framework out of square tubing, it would probably be 2" square. I don't think 1" square tube would hold up well to hard hits.. too easy to bend. Tubing diameter is what resists bending.. tubing wall thickness is what resists dents.

'80 CJ5 w/AMC360, T176, D44 w/Detroit 4.56, RE 4" YJ lift and 35s..


Lower 2

Guardrail

Down Schoolbus

Slickrock Tellico

Save

Crozet

More Crozet
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post #9 of 14 Old 02-03-2010, 06:21 PM Thread Starter
motiv8ya
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Thanks BESRK, that is just the info I was looking for. 2 inch square tube it is..
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post #10 of 14 Old 04-30-2010, 11:07 PM Thread Starter
motiv8ya
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I took a shot at making one out of the 1 inch square .120 wall and I didn't feel comfortable with it when I set the drivetrain down on it.

I bumped up to 1 1/2 inch square .188 wall and I'm in the process of making another crossmember. I don't have access to a tubing bender so I have to stick with the square tubing. The 1 x 2 .120 wall looked too small and the 2 x 3 .120 was too big of an outside diameter. I'll post a pic when I'm done with it.
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post #11 of 14 Old 06-13-2010, 05:26 PM Thread Starter
motiv8ya
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Here's what I wound up with....

Unfortunately I decided against using the transmission combo that I built it for so it will go unused.
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post #12 of 14 Old 06-18-2010, 12:01 PM
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Nice what size tube did you end up using?

couldn't you just grind off the beads thats holding that plate on?
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post #13 of 14 Old 06-18-2010, 05:41 PM Thread Starter
motiv8ya
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Quote:
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Nice what size tube did you end up using?

couldn't you just grind off the beads thats holding that plate on?
It's 1.5 x 1.5 sq. .180 wall, I'm working on version#2 to accomodate a t176/Dana 300 now
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post #14 of 14 Old 07-22-2010, 04:39 PM Thread Starter
motiv8ya
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Here's version #2, it bolted right up, nice and easy.


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