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Author Topic: CJA EXECs  (Read 6225 times)

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gsxtacy

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« Reply #15 on: February 22, 2007, 06:49:18 PM »
ahem...engineer....

yeah, a winch line on a snatch block effectively doubles the force applied (conversation's sake...9 grand to 18 grand at the tow point) while keeping both cables at the orig. strength.

BlackYJ is 100% correct, you get a gold star  :lol:

I wouldn't pull you out with those hooks...not even from the ditch on the side of the road (it's a tj...you never know)
should be double nutted grade 8 (or more), completley through the frame. put on TIGHTLY and loc-tite applied liberally.  for 18 thou, i would think 1/2 inch or bigger should do well, as the shear strength (Ultimate Tensile Strength) is 150 ksi... that is, 150 thousand ppsi.
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Offline BlackYJ

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« Reply #16 on: February 22, 2007, 09:17:09 PM »
Quote from: "gsxtacy"
i would think 1/2 inch or bigger should do well, as the shear strength (Ultimate Tensile Strength) is 150 ksi... that is, 150 thousand ppsi.


The UTS is 150 ksi but the shear strength is 17870 lbf or ~90 ksi for a 1/2 grade 8 bolt
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Offline BlackYJ

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« Reply #17 on: February 22, 2007, 09:20:00 PM »
Quote from: "gsxtacy"
i would think 1/2 inch or bigger should do well, as the shear strength (Ultimate Tensile Strength) is 150 ksi... that is, 150 thousand ppsi.


The UTS is 150 ksi but the shear strength is 17870 lbf or ~90 ksi for a 1/2 grade 8 bolt
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gsxtacy

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« Reply #18 on: February 23, 2007, 04:04:56 PM »
missed that...hmm...guess that's why there's holes for 2 bolts on most tow-hooks  :P  :P

like i said, don't hold me to it.

welding engineer only
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Offline Vinman

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« Reply #19 on: February 23, 2007, 05:08:31 PM »
You guys can talk grade 8, double nut, ksi, psi, tensile strength etc all you want but, at the end of the day, most low profile Warn winches are held on with (4) 3/8" grade 5 bolts fastened to a cast, white metal type material.

Has anyone ever seen a winch pulled off the plate? I'm sure there are a few cases of the winch body breaking but I bet those failures are due to a home-made mounting plate that is not designed to prevent flexing of the plate.

disclaimer: the ksi, psi, and any other si is over my head.

Vince
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
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Offline BlackYJ

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« Reply #20 on: February 23, 2007, 05:23:26 PM »
Quote from: "Vinman"
disclaimer: the ksi, psi, and any other si is over my head.

Vince


Thats the point vince, to keep you unedumacted type out of our geek discussions  8)  8)
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Offline Vinman

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« Reply #21 on: February 23, 2007, 05:53:58 PM »
Quote from: "BlackYJ"
Quote from: "Vinman"
disclaimer: the ksi, psi, and any other si is over my head.

Vince


Thats the point vince, to keep you unedumacted type out of our geek discussions  8)  8)


Don't pick on me just because I refer to grade 3 as my senior year, (which, by the way, was the best 7 years of my life :shock: )


Vince
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/l ,[____],
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 ()_)-()_)-o-)_)

Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
. 
 Resident prick is my job and it took me ten years to earn that title

gsxtacy

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« Reply #22 on: February 23, 2007, 05:58:56 PM »
xDD i love that vinman...but seriously...

i think he should be thinking about re-locating that winch, and a lift and tires before the hooks.... or just put some 1 7/8 " beans on there and build a towbar, like i did...
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Offline 01sahara

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« Reply #23 on: February 23, 2007, 08:35:44 PM »
Quote from: "gsxtacy"
xDD i love that vinman...but seriously...

i think he should be thinking about re-locating that winch, and a lift and tires before the hooks.... or just put some 1 7/8 " beans on there and build a towbar, like i did...


Yes he needs to fix the hooks. It’s a requirement for a club run, Having safe tow points and communication on the trail is far more important than a lift. As I posted earlier changing the hooks left to right may give the clearance needed for the stock bolts to fit into the stock factory holes. Or get better nuts on the bolts. We can not tell from the photos. If you have time bring the rig out so someone can look at it we would be glad to help. PM me if you still need help.

Blair
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gsxtacy

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« Reply #24 on: February 23, 2007, 09:15:22 PM »
very nicely put blair
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Offline SwampSinger

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« Reply #25 on: February 24, 2007, 12:22:05 AM »
Duct Tape and 1.5" self taping screws are the way to go.....


and Vince stop lying... It was the best 8 years ...not seven. :roll:
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