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Homebrew U-bolt flip questions
#47344
03/05/03 08:02 AM
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Joined: Apr 2002
Posts: 394
OP
Mudrunner
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I came across some free <img border="0" title="" alt="[Big Grin]" src="images/icons/grin.gif" /> 1/4 inch plate steel that should work great. If I fab up the plates, they won't have the turned up ends like the kits do. \___________/ What are the purpose of these turned up ends? Are they vital? The only thing I can think of is maybe they help keep your leaf spring from kinking. Anyone have any experience with this issue?
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Re: Homebrew U-bolt flip questions
#47345
03/05/03 08:42 AM
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Anonymous
Unregistered
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The turned up ends help stop the sides of the plate bending down from the force of the U bolts. Do you get what I mean? Kinda hard to explain. There is probably other reasons for it too I dunno. Anyway shouldnt cost more than 5 or 10 bucks to have a shop bend the ends for you but Im thinking 1/4 inch is too thin anyway. Go for 3/8 thick. Paul.
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Re: Homebrew U-bolt flip questions
#47346
03/05/03 09:44 AM
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Joined: Feb 2000
Posts: 4,160
Toyota Moderator
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</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by ausyota: <strong>The turned up ends help stop the sides of the plate bending down from the force of the U bolts. </strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Exactly. You have to have the bend w/ thin steel.
I had some made locally out of 1/2" flat bar w/o the bend. <img src="http://www.wildyoats.com/vbulletin/attachment.php?s=&postid=1632" alt=" - " />
They sheered them off and punched the holes in about 15 minutes and the total cost for the pair was about $25... which was about the cost of ONE of the 1/4" thick bent gold colored plates I bought from the 4x4 shop. <img border="0" title="" alt="[Big Grin]" src="images/icons/grin.gif" /> (so I just used the gold one for a pattern and returned it unused!)
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Re: Homebrew U-bolt flip questions
#47347
03/05/03 04:19 PM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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Yes, 1/4" plate will bend, even with the bent up ends, I have the remnants of a flip kit from a well known vendor in frnt that has basically formed itself around the springs in about 4 years of use. Its about 1/4" thick steel bent up ends. I have flat 1/2" plate in back, but will be replacing that with 3/8" thick w/ bent ends front and rear.
And use a large diameter u-bolt, I run 5/8" front and rear and they have held up great, after wearing out/stripping 1/2" and 9/16" bolts, I only run 5/8" now.
And the bent up ends also help prevent stressing the leaves at the transition, if you had a nice sharp edge, the stress would concentrate there and fatigue the springs. Rounding the edge or bending it let the spring flex naturally at that point. <small>[ March 05, 2003, 10:23 AM: Message edited by: 4Crawler ]</small>
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Re: Homebrew U-bolt flip questions
#47348
03/05/03 05:54 PM
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Joined: Aug 2001
Posts: 5,986
Toyota Section Staffer
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ErikB, do you have more shots of that? I'm trying to figure out what looks like a bracket welded to your axle, and it has me mystified... Are you using U bolts, or straight bolts into a bottom sort of plate?
-Bill '87 4Runner w/ '96 5VZ-FE, 'Red Chili II' '97 Taco XtraCab 3RZ-FE, 'BlackBean' TLCA # 13257, Rising Sun 4x4 Club Land Use Coordinator "He who stops being better stops being good." -Oliver Cromwell
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Re: Homebrew U-bolt flip questions
#47349
03/06/03 04:27 AM
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Joined: Apr 2002
Posts: 394
OP
Mudrunner
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</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans"> I run 5/8" front and rear and they have held up great, after wearing out/stripping 1/2" and 9/16" bolts, I only run 5/8" now. </font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">well, I was going to use 9/16" bolts. Do you think the stripping was due to maybe using fine thread instead of coarse thread? The stock bolts seem pretty stout. What size are they?
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Re: Homebrew U-bolt flip questions
#47350
03/06/03 04:50 AM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by Lou Bell: <strong>well, I was going to use 9/16" bolts. Do you think the stripping was due to maybe using fine thread instead of coarse thread? The stock bolts seem pretty stout. What size are they?</strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Stock is 14mm (9/16"). You usually have no choice of threads on a u-bolt. 9/16" is the smallest size I would use, but I find the 5/8" are not stressed anywhere near what a smaller bolt is. I find the threads on the Rancho u-bolts are the best formed in that they fit the nut well. Many u-bolts use a rounded thread on the bolt and the nuts have a V-shaped thread. Each time you install the nut, the threads are partially deformed and ultimately wear out. The Rancho threads seem more V-shaped and they use a lock nut instead of the deforming threads to lock the nut in place. Seems to work fine, never had one fall off yet.
Now the official line is that u-bolts are single use items and new ones are to used each time. I don't like the hassle of rounding up all the hardware every time I decide to pull off the springs to work on something. The larger u-bolts are under a lot less stress and seem to last and last. I got my rear bolts used 5 years ago (and I have no idea how long they were used befor that) and they are still in excellent shape. Just one less thing to worry about.
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Re: Homebrew U-bolt flip questions
#47351
03/06/03 05:54 AM
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Joined: Nov 1999
Posts: 863
Rock Warrior
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I used 1/2" plate and 5/8" U bolts. No need for bends to add strength, and the U bolts are plenty strong too <img border="0" title="" alt="[Wink]" src="images/icons/wink.gif" />
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Re: Homebrew U-bolt flip questions
#47352
03/06/03 07:31 AM
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Joined: Feb 2003
Posts: 65
Getting the Wheeling Fever
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I used plates from cherokee for the rear and passenger side front i think from chevy van or pkup. driver side is still stock toyota. bump stops were just held on by 2 brackets w/ nuts on top of ubolts.
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Re: Homebrew U-bolt flip questions
#47353
03/06/03 07:33 AM
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Joined: Feb 2000
Posts: 4,160
Toyota Moderator
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I'm using 5/8" Rancho u-bolts all around as well. Good stuff. <img border="0" title="" alt="[Cool]" src="images/icons/cool.gif" /> Bill- That's my trussed/shaved Taco axle w/ welded blocks: <img src="http://home.off-road.com/~bibelheimer/images/temp/3-02_2/tacoaxle6.jpg" alt=" - " /> <img src="http://www.wildyoats.com/vbulletin/attachment.php?s=&postid=1633" alt=" - " /> The u-bolts pass through the truss, so that's probably what you're looking at. Details here: http://www.4x4wire.com/ubb/ultimatebb.php?ubb=get_topic;f=11;t=006524Someone asked me for dimensions of the plate- They were cut from 1/2" x 6" flat bar 4.5" x 6" outside dimensions 11/16" punched bolt holes 2-5/8" x 3" inside the bolt holes (3" is the axle tube thickness, 2-5/8" is the spring width give or take) The center hole is actually a slot 11/16" x 1-11/16" so you can move the axle up to an inch forward or backward (if you drill your perches to match), which is how I moved my axle back an extra inch. HTH.
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