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Offline Jim-Willy

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Bow Shackles
« on: June 17, 2005, 22:24:02 »
What rating do you use, mine are 3.25 tons and I was gono buy a couple more, I saw some at 4.75, is this overkill, I drive a 90 and aren't planning on recovering a stolli or owt?
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Offline Wanderer

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Bow Shackles
« Reply #1 on: June 17, 2005, 22:27:08 »
You need to allow for the weight of the vehicle while being moved across the ground as well as the gloop effect of mud which can double the weight of the vehicle.
I don't think there's such a thing as overkill when your (in effect) lifting something. If a shackle goes it goes with a heck of a bang.

Ed
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Ed
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Offline Manicminer

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Bow Shackles
« Reply #2 on: June 17, 2005, 22:30:26 »
I have seen 10T shackles bend. It all depends on the circumstances on the day.
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Offline Jim-Willy

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Bow Shackles
« Reply #3 on: June 17, 2005, 22:37:32 »
Now you've got me worried, should i reserve the shackes i've got for light use and buy some heavy ones for general use.  I ship to Sweden week after next for the offroad tour and plan on getting stuck, I need to trust my kit?!
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Offline rokcrawlin

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Bow Shackles
« Reply #4 on: June 17, 2005, 22:44:27 »
Quote from: "jim-willy"
Now you've got me worried, should i reserve the shackes i've got for light use and buy some heavy ones for general use.  I ship to Sweden week after next for the offroad tour and plan on getting stuck, I need to trust my kit?!

use preventitive ground reading and you should only need light recovery kit be gung ho and you need heavy recovery kit its your choice to get stuck  :lol:  :lol:
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Offline Jim-Willy

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Bow Shackles
« Reply #5 on: June 17, 2005, 22:50:13 »
Quote from: "rokcrawlin"
Quote from: "jim-willy"
Now you've got me worried, should i reserve the shackes i've got for light use and buy some heavy ones for general use.  I ship to Sweden week after next for the offroad tour and plan on getting stuck, I need to trust my kit?!

use preventitive ground reading and you should only need light recovery kit be gung ho and you need heavy recovery kit its your choice to get stuck  :lol:  :lol:


I agree to a point, but when you're in a convoy and something looks 50/50?  I'm sensible but also i'm a bloke! and the only way to test your limits is to exceed them, i'm gono go 4.75t I think.
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Offline muddyweb

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Bow Shackles
« Reply #6 on: June 20, 2005, 12:39:32 »
I know this is going to sound a little sanctimonious, but if you bend a 4.75T shackle doing a recovery in a Land Rover... you are doing it wrong.

I tend to use 4 tonne shackles... and like all the other gear I use, these are TESTED and RATED bits of kit.  That means they have a proper rating and a safety factor on them too.

If the vehicle is so heavily bogged that you think a bit of gear isn't up to it, you need to look at a different way of recovering it.
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Offline lowey

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Bow Shackles
« Reply #7 on: June 20, 2005, 18:03:22 »
Just be careful you dont have Uri Geler in the vicinity cos he CAN bend metal. :lol:
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Offline Jim-Willy

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Bow Shackles
« Reply #8 on: June 20, 2005, 18:35:58 »
I know where your coming from, my shackes and straps are good, rated bits of kit but i've ordered some 4.75 rated shackles from Pro-Comp just to be safe.  I probably won't get stuck as i need to drive the truck 2500-3000 miles home so i can't play that hard, but mistakes happen.
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Offline Wanderer

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Bow Shackles
« Reply #9 on: June 20, 2005, 19:47:09 »
I may be the suspicious type but weights etc for lifting and for pulling seem to have different sets of rules.

ie. X tonnes (not suitable for lifting).
So are they X tonnes or aren't they?
How do you know if you've got the "safe for lifting" items?
Anyone know?

Ed
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Offline muddyweb

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Bow Shackles
« Reply #10 on: June 20, 2005, 19:53:36 »
It's all to do with the type of tests they undergo and the minimum safety factor they carry.  It's not a con Ed... honest ;-)
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Offline Wanderer

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Bow Shackles
« Reply #11 on: June 20, 2005, 20:05:18 »
You'd think they'd undergo the same tests to breaking point regardless. the only diference being that something being lifted is going to fall back on to the floor whereas something being pulled (in our field of use (pun intended)) going crashing back to the bottom of whatever it's trying to get out of.

Some of the stuff being touted around are obviously nowhere as strong as they ought to be. I doubt some have even been tested to the same standards (having been imported)

The only problem I have ever had was down to my own operator error.

Having forgotten to fit my (get out of the brown smelly. I'm stuck) straps and shackles I had to do a shackle up under water and mud.
Basically it went tight and I thought that everything was Ok but the mud meant it had gone prematurely tight adn wasn't on properly.

It came off ripping the few threads that were holding it. Luckily no one got hurt but a lesson learnt.

Ed
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Offline freeagent

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Bow Shackles
« Reply #12 on: June 22, 2005, 22:06:41 »
the ratings (ie 4.75t) are for lifting. lifting gear typically has a safety factor of 7 or 8:1, that means in theory you could pull around 30 tonnes with it.... personally i only own proper rated, tested shackles (not the cheap unmarked ones you see at the shows) and would be more than happy to use a 4.75t shackle for all landrover aplications.
even the harshest kinetic recovery only exerts around 12 tonnes, and you should be using a bridle to split the load anyway.
anyone who breaks shackles while recovering a landrover is either using unsuitable kit or doesn't know what they are doing....
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Offline Petergg

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Bow Shackles
« Reply #13 on: June 23, 2005, 10:26:16 »
Quote from: "freeagent"
the ratings (ie 4.75t) are for lifting. lifting gear typically has a safety factor of 7 or 8:1,


I think you will find that it  is x 6 for Alloy and x 4 for steel.

Peter
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Offline muddyweb

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Bow Shackles
« Reply #14 on: June 23, 2005, 10:37:02 »
Quote from: "Petergg"
I think you will find that it  is x 6 for Alloy and x 4 for steel.


Whatever it is, it should be marked on the item...  all my straps are 7:1, can't remember what the shackles are... they all need cleaning anyway.. again..
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Offline EvilEd

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Bow Shackles
« Reply #15 on: June 23, 2005, 12:11:33 »
As said above, always use a bridle. that way you don't risk twisting your chassis either. The LR and Jeep chassis are not designed to have a 4t load on one side :) Ideally, if towing use a bridle both ends, and a strap / rope with a slighly lower breaking strain as this means the rope will break before the strap / shackles and you only have a rope flying through the air, no lump on the end of it!
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