Jim
Member Since: 09 Sep 2005
Location: Aberdeenshire
Posts: 215
  
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What would the reccommended size be for:
 road towing
pulling someone out of mud Jim
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 18th Oct 2005 9:33 am |
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Slimer
Site Moderator
Member Since: 06 Jan 2005
Location: Last Exit to Nowhere
Posts: 16295
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Stronger the better in both cases The End
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| 18th Oct 2005 9:39 am |
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Jim
Member Since: 09 Sep 2005
Location: Aberdeenshire
Posts: 215
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I guess that 
But what sizes are readily available?
I have found 2, 3.25 and 4.75 tonne so far. Jim
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| 18th Oct 2005 9:45 am |
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Slimer
Site Moderator
Member Since: 06 Jan 2005
Location: Last Exit to Nowhere
Posts: 16295
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I keep 3 of the 4.75s in the car, a few places sell 6.x ones so I might add one of them too at some point The End
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| 18th Oct 2005 9:57 am |
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BN
Member Since: 18 Mar 2005
Location: Here
Posts: 6463
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Slimer wrote:I keep 3 of the 4.75s in the car, a few places sell 6.x ones so I might add one of them too at some point
At least double the weight of the car on a couple of shackles, i.e 6 tonnes.
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| 18th Oct 2005 10:05 am |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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BN wrote:Slimer wrote:I keep 3 of the 4.75s in the car, a few places sell 6.x ones so I might add one of them too at some point
At least double the weight of the car on a couple of shackles, i.e 6 tonnes.
The rating of shackles (for the tested ones) is for lifting, generally with a safety factor of three, also bear in mind that to be able to use them, they need to fit the recovery points - the 6T bow shackles are quite big....
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| 18th Oct 2005 10:09 am |
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Jim
Member Since: 09 Sep 2005
Location: Aberdeenshire
Posts: 215
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BN wrote:Slimer wrote:I keep 3 of the 4.75s in the car, a few places sell 6.x ones so I might add one of them too at some point
At least double the weight of the car on a couple of shackles, i.e 6 tonnes.
So would that be 2 x 3.25 tonne  Jim
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| 18th Oct 2005 10:21 am |
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BN
Member Since: 18 Mar 2005
Location: Here
Posts: 6463
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Jim Last wrote:BN wrote:Slimer wrote:I keep 3 of the 4.75s in the car, a few places sell 6.x ones so I might add one of them too at some point
At least double the weight of the car on a couple of shackles, i.e 6 tonnes.
So would that be 2 x 3.25 tonne
No I keep 6 tonne shackles Jim. In reality over enthusiastic retreival can be very dangerous. TFC found that his recovery snapped so easily when he became stuck and in no way was he really stuck. Go for the best you can afford with the best tensile strength.
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| 18th Oct 2005 2:11 pm |
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Jim
Member Since: 09 Sep 2005
Location: Aberdeenshire
Posts: 215
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With TFC Recovery point breaking, what did they then attach to?
Who are reputable makers of shackles, other than 'Black Rat' as these only go upto 4.75 tonne. Jim
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| 18th Oct 2005 2:19 pm |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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Jim Last wrote:With TFC Recovery point breaking, what did they then attach to?
Who are reputable makers of shackles, other than 'Black Rat' as these only go upto 4.75 tonne.
Jim, it wasn't the recovery point, it was an old strop, although it was being used to 'snatch' not tow, which would have contributed to its failure
any shackles provided with a test cert. or traceable back to a proof test loading for that batch, will be OK
<edited to add: I got my 6.5 tonne ones from here http://www.forgetec4x4.co.uk/winchingequipment.html >
Last edited by 10forcash on 18th Oct 2005 2:27 pm. Edited 1 time in total
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| 18th Oct 2005 2:20 pm |
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Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
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But a 4.75 ton can be a lot stronger than a 6 ton, it is only the working rating not its actual strength. DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
Porsche Cayenne V8 Diesel S
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| 18th Oct 2005 2:22 pm |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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Pelyma wrote:But a 4.75 ton can be a lot stronger than a 6 ton, it is only the working rating not its actual strength.
yep, there is also the issue of wether a 6T shackle can be fitted onto vehicle recovery points, due to their size, I carry both 4.75 and 6.5T shackles, along with 10T strops
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| 18th Oct 2005 2:30 pm |
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Jim
Member Since: 09 Sep 2005
Location: Aberdeenshire
Posts: 215
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Black Rat 4.7- tonne bow shackle broke at an impressive 33.7 tonnes’ load. We then performed the same test on a likewise randomly selected 3.2-tonne Black Rat bow shackle which, in turn, broke at a no less impressive load of 27.2 tonnes.
So are 'Black Rat' out performing many other makers? How would a Black Rat 4.75 shackle compare with some 6.5 tonne ones from other sources? Jim
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| 18th Oct 2005 2:44 pm |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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Jim Last wrote:Black Rat 4.7- tonne bow shackle broke at an impressive 33.7 tonnes’ load. We then performed the same test on a likewise randomly selected 3.2-tonne Black Rat bow shackle which, in turn, broke at a no less impressive load of 27.2 tonnes.
So are 'Black Rat' out performing many other makers? How would a Black Rat 4.75 shackle compare with some 6.5 tonne ones from other sources?
provided you compare like-for-like, there should be very little difference, unless a manufacturer (or reseller, as I don't think BR actually manufacture anything, just buy in, brand & resell)is deliberately upping the safety factor or derating the SWL for their products
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| 18th Oct 2005 2:52 pm |
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Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
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From the articles I read this seems to be exactly what they are doing as they do appear to break at a lot higher load than others. But I'm not an engineer so someone maybe able to inform us for definite. DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
Porsche Cayenne V8 Diesel S
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| 18th Oct 2005 3:28 pm |
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