rating of winch extesion straps

Submitted: Wednesday, Jun 06, 2007 at 18:04
ThreadID: 46358 Views:5129 Replies:7 FollowUps:8
This Thread has been Archived
Can anybody tell me why the majority of winch extension straps are rated at 4,000-4500 kgs when snatch straps and tree protectors are rated at 8,000+kgs? The only extension strap that had more than 4,000kg was a huge (length and price!) one from ARB agency. I live in a medium country town and checked out 3 auto access. places and the ARB agency. Even recovery packages had differing ratings. I suppose I want to know if you join an extension strap to either a winch, snatch strap or tree protector do they all effectively become 4,000 rated?
Thanks, Craig
Back Expand Un-Read 0 Moderator

Reply By: Member - stefan P (NSW) - Wednesday, Jun 06, 2007 at 18:10

Wednesday, Jun 06, 2007 at 18:10
The only reason I can come to is that the winch extension strap doesn't get a "shock" load like a snatch strap would. I am probably wrong on this I am only using my common sense on this not scientific evidence. If you were to join a snatch and winch ext, well then yes the total set up is only as strong as the weakest link. thats my 2c ;)

Cheers Stefan
AnswerID: 245183

Reply By: OtherBrother - Wednesday, Jun 06, 2007 at 18:26

Wednesday, Jun 06, 2007 at 18:26
briggzee,

snatch straps only get joined to snatch straps if necessary for snatching. The fewer bits and pieces used to join the two vehicles together the better.

Winch extension straps get joined to winch cables for winching or in towing situations. They shouldn't be used as part of a snatch set up as they are not designed for shock loading

I'm guessing that tree protectors probably get the bigger rating because they are esentially doubled over in the application for which they're designed.

You're essentially correct in that the rating af any set up is that of it's lowest rated component.

Regards,
AnswerID: 245188

Follow Up By: briggzee (WA) - Wednesday, Jun 06, 2007 at 18:33

Wednesday, Jun 06, 2007 at 18:33
OtherBrother, in doing a search on this subject before posting, it seems that it is common for the two to be joined but not with a shackle. Also aren't electric winchs usually rated above 4,000kgs and the extension strap designed to be joined to it (hence the name). Not questioning you, just confused as to why most extension straps aren't rated higher or dont my 'local'shops have a good range?
0
FollowupID: 506274

Follow Up By: Kev M (NSW) - Wednesday, Jun 06, 2007 at 18:41

Wednesday, Jun 06, 2007 at 18:41
My understanding of elec winches is that they are rated to the top layer of cable on the drum, each successive layer is rated lower than the one above, therefore a winch that has all its cable out will effectively be rated way lower than it is actually stipulated for.

Am I right??

Kev
Russell Coight:
He was presented with a difficult decision: push on into the stretching deserts, or return home to his wife.

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 506277

Follow Up By: OtherBrother - Wednesday, Jun 06, 2007 at 20:01

Wednesday, Jun 06, 2007 at 20:01
brigzee,

yeah, I didn't address your main question, was intent upon highlighting the difference between static and dynamic load applications.

I guess 4000kg is the most commonly available and roughly equates to the 8000/9000 lb of most winches, but 6000kg & 8000kg rated extension straps aren't too hard to find on the net (eg from google, so maybe your local shop does need to lift its game.

The whole rating thing for recovery gear is a bit suss anyway, where non 4WD-specific bits like shackles have a SWL rating derived from their minimum breaking strength divided by a fair safety margin, while all the straps and the like just use a minimum breaking strength.

My hand winch, rated at 3200kg lift, 4800kg pull has a 16mm cable; 9000lb electric winches seem to get away with an 8mm cable. - Go figure.

That site link that tvl posted above is a pearler.

Regards,

0
FollowupID: 506297

Follow Up By: OtherBrother - Wednesday, Jun 06, 2007 at 20:03

Wednesday, Jun 06, 2007 at 20:03
ooops, that site link tvl posted below
0
FollowupID: 506298

Follow Up By: Member - Phil G (SA) - Wednesday, Jun 06, 2007 at 22:03

Wednesday, Jun 06, 2007 at 22:03
Kev, I think its the other way around. Maximum pull is when the cable is fully out (drum is smaller diameter, so is lower geared).
0
FollowupID: 506325

Follow Up By: Robin Miller - Thursday, Jun 07, 2007 at 08:32

Thursday, Jun 07, 2007 at 08:32
Yep . as per Phil Other way around

Very few winches ever reach the rating in practise , and you can get much stronger winch extension straps if desired.

Robin Miller
0
FollowupID: 506362

Follow Up By: Kev M (NSW) - Thursday, Jun 07, 2007 at 11:47

Thursday, Jun 07, 2007 at 11:47
Thanks,

I knew it was something along those lines, Thanks for the clarification.

Kev
Russell Coight:
He was presented with a difficult decision: push on into the stretching deserts, or return home to his wife.

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 506393

Reply By: tvl - Wednesday, Jun 06, 2007 at 18:40

Wednesday, Jun 06, 2007 at 18:40
try this
Site Link
AnswerID: 245191

Reply By: Member - Doug T (W.A) - Wednesday, Jun 06, 2007 at 18:41

Wednesday, Jun 06, 2007 at 18:41
winch extension straps won't recoil like a Snatch Strap or Cable, As for sost, well why not go to a Truck Accessory shop and get the load binder Straps , they are rated at 2000kg I have in my recovery box enough extension straps to reach 200 meters, and you can bet the bloody tree or anchor point is going to be 202 meters , is that Murphies Law .
30m costs $60
Just Straps Standard Winch Extension Strap
4000kg Breaking Limit, 50mm Webbing Strap, and a choice of 10m, 20m, or 30m lengths.
For use in conjunction with a hand or vehicle mounted winch. Made from hi-tenacity polyester webbing to ensure minimum stretch. Fully protected sewn eyes at both ends for



30 m costs $120
8000kg Breaking Limit, 65mm Webbing Strap, and a choice of 10m, 20m, or 30m lengths.
Heavy duty winch extension strap for use with larger vehicles. Use in conjunction with a hand or vehicle mounted winch. Made from hi-tenacity polyester webbing to ensure minimum stretch. Fully protected sewn eyes at both ends for ease of connecting. Standard
gift by Daughter

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 245193

Reply By: Rod - Wednesday, Jun 06, 2007 at 21:55

Wednesday, Jun 06, 2007 at 21:55
ARB are selling off their old stock of blue winch extension straps cheap. Bought a 8000kg, 20m extension strap yesterday for $95.

Their new gear is colour coded like the wiggles. Strap with the same lenth and rating in wiggles colour scheme was $165.
AnswerID: 245258

Reply By: Member - Phil G (SA) - Wednesday, Jun 06, 2007 at 22:06

Wednesday, Jun 06, 2007 at 22:06
If you're using an 8000, 9000 or 9500lb winch, a 4000kg strap matches or exceeds the rating of the winch.
AnswerID: 245263

Follow Up By: Crackles - Thursday, Jun 07, 2007 at 18:05

Thursday, Jun 07, 2007 at 18:05
Technically both the 9K & the 9.5K will on the bottom layer pull 4.1 & 4.4 tonne respectively at stall but in reality barely any electric winch pulls what they are rated to as the batteries can't supply enough power to reach it. The main problem with extension straps is they are well & truely overloaded when the winch is double blocked. Personally I wouldn't use a 4T extension strap with any winch over 8000lb as the breaking point is far too close to the stall point of the winch & would take only a minor cut or wear for the thing to let go.
I carry a length of steel winch cable for extending & if one wanted to save on weight some plasma rope would be ideal. Can also run them around corners through a snatch block when towing as well unlike the flat winch strap.
Cheers Craig...........
0
FollowupID: 506460

Reply By: briggzee (WA) - Thursday, Jun 07, 2007 at 12:31

Thursday, Jun 07, 2007 at 12:31
Thanks everybody for their replies. That site of TVL's is excellent, thanks. Will give ARB a ring to see if they have any specials. Once again, thanks
Craig
AnswerID: 245368

Sponsored Links

Popular Products (9)