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Discussion Starter #1 (Edited)
Ok, so I'm pretty much set on doing this. But I've never seen this stuff in real life so I'm having trouble figuring out what thickness I might need and how much support I will need.

For back ground I've got an 83 Toyota pickup that I'm in the process of putting dual transmissions in(I know the new fad). I've got the floor cut up and everything pushed up for my new flat bottom.

I'm figuring on ordering a 4'x4' piece but I need to know if 3/8" is enough? is 1/2" overkill? Also what kind of span can this stuff handle without support? the full 4 feet maybe?
Ok so flame away now but if your kinda nice I'll post up some pics as I go.
 

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How much do you expect to use it? How high is your belly? Seems to me 3/8" would want to be supported @ 10" or so if you've planning to use it heavily. Gunmetalcruzer used 3/4" and he drives like a little girl :flipoff2:
 

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Discussion Starter #3
Yeah, It's pretty much going to be dragging on everything. I've got a 23-24" frame height so I'm assuming that I'll be about an inch or so lower after the uhmw plus bracing. Could the 3/4 go 4' without bracing? or would I be better off bracing the shit out of 3/8". I'm going for less weight but i plan to bash the hell out of it on every trip out.
 

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Here's my underneath situation:



and the UHMW solution:



I'm using 3/8" and it has worked great so far. The only problems I've had are at the corners of the skid; where it's not bolted down it'll peel back a little bit. In the center it has held up great and you can definitely tell the difference when sliding over stuff.
 

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Something else to consider is how often you want to replace it. Tom's 3/4" piece is still going sytrong after a year of hard use, 3/8" would probably be gouged thin in several spots. Hopefully he can chime in with his bracing, I'll search again for his report.
 

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Is this similar to the nylon stuff they use for bathroom walls ???

That stuff is like 7/8" thick, and I'd think it would be easy to find used - even comes with it's own graffiti.........and booger stains as well.......:D
 

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Is this similar to the nylon stuff they use for bathroom walls ???

That stuff is like 7/8" thick, and I'd think it would be easy to find used - even comes with it's own graffiti.........and booger stains as well.......:D
if your talking about onyx ( the stuff with swirls in it and smells like fiberglass whene you grind it) , its way to brittle.
 

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Just did this myself. I went with 1/2'' after seeing it up close. It is also bolted up to a sheet of 3/16 w/ 9 bolts.

<a href="http://photobucket.com" target="_blank"><img src="http://i143.photobucket.com/albums/r138/jpcrawleram/skid3.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
 

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pretty much wilson covered it.:D Only advice is leave it long on the sides to protect the cradle tubes and let it self clearence.
 

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Discussion Starter #13
So, I'm still not totally sure here. I'm sold on the 1/2 inch stuff but should I use a plate to back it or would I be fine making a grid of square tube to support it? I guess my main problem is that I want to make cover from frame rail to frame rail. Which is about 4 foot across. I have the trans and transfer sopported so the plate is purely for protection. I hate to put a half inch of UHMW plus an inch of square tube below my frame rails.
 

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So, I'm still not totally sure here. I'm sold on the 1/2 inch stuff but should I use a plate to back it or would I be fine making a grid of square tube to support it? I guess my main problem is that I want to make cover from frame rail to frame rail. Which is about 4 foot across. I have the trans and transfer sopported so the plate is purely for protection. I hate to put a half inch of UHMW plus an inch of square tube below my frame rails.
i used 1/2" stuff for mine. but i also used and old street sign that i found under the storage room here at the house....it is thin, but better than just the uhmw...

also, it is only about 14.5x17....i used 1/2 flat machine screws 1.5" and counter sunk them....the skid shoudl not warp b/c there is a decent amount of tubing right against it where it will be mounted...



 

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After running both UHMW and a steal skid I would never go back to UHMW. I could probably be talked into running a harder plastic like poly carb but thats still a long shot. My steel skid dosent weigh much more, slides over rocks a million times better, I weld/cut to cutomize to my drivetrain and if it gets messed up I can simply cut/reweld.

Here is my 1/2 UHMW from the past.



 

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i run 3/4" on my 3100 lb. buggy, and i have been running it for over 2 years. i routered the corners, countersunk some allen bolts, and it has held together quite well. i don't use any metal or aluminum backing, and every time i pull it off it's still straight. go thick.

holley
 

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I used 1/2 HDPE (cutting board material) and really like it.. I made a very strong frame for it to bolt to with countersunk hardware... the sides are shaved down with some gouges but nothing outrageous... I made effectivly ramps at both ends so it would never get hung on the ends of the belly pan and would definiatly do it again...

If your really strapped for clearance my bet is on the plastic for being the better choice... steel will deform and hit your pan or whatever.... if the pastic hits it I would think it would act like a cusion somewhat...

the steel choice is quicker/easier and cheaper though...

my 0.02
 

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I use .750" that I routed out for clearance.
It's holding up ok.
The best thing about uhmw is how quiet it is over rocks.
Are you trying to sneak up on them:flipoff2:

Kinda wierd how some guys say UHMW is awesome and other guys say it sucks. Everyone has there own opinion, but....:confused:
 
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