Discussion in 'The Garage' started by jms, Mar 29, 2006.
To "double rig", if you mean using a snatch block, each cable would only see half of the load.
Yep, synthetic is better in pretty much every way. Those numbers sound about right from what I have read on specs for cable (my 3/8" masterpull is rated at 23,500 lbs.).
The synthetic rope Ramsey sells is rated over 19,000 lbs and has a temp rating greater than 900 degrees before degradation.
Please find the temp rating of the rope before you purchase. It needs to be a minimum of "around" 350 degrees.
I have seen amsteel blue melt to the drum on a warn 9.5ti under heavy use.
Hi-Jack hehe ,
Can someone explain why Ramsey doesn't want me running rope on my 12,000 pounder ?
Everyone I talk to say to anyway , and I would prefer to do it too .
Ramsey is covering their liability butt... What exactly did they say?
Only winches to 9500 pounds is what I was told , but was never told why .
I don't care about the weight factor , I want rope for the safety factors .
The reason Ramsey says only 9500's and under is because the winchrope they sell is rated for 9500's and smaller. They do not make a winchrope for a 12K so they aren't going to say use winchrope so they can cover there a$$. If they made winchrope for a 12K they would say only use there winchrope. It limits the liability to them if you use someone elses product on there winch and they didn't say ok.
Get winchrope for a dedicated trailrig. It is so much safer then the steel line. I have told you this in the past though.
synthetic winch rope rocks. So much safer to use. Only downside is that it will slowly fray with use. Thats really the main reason to get 3/8" over 5/16". 5/16" is plenty strong enough, but 3/8" will be strong enough after several years and some fraying. If you have an 8274, it doesnt matter what heat rating the rope has. Additionally, because of the factory hole in the drum, you can pretty easily buy bare rope from a marine supply place and make your own winch rope out of it. Might save some coin...
This is a link to the Federal Regs as they relate to commercial trucks. It gives a breakdown of various strapping, webbing, steel cable capabilities.
love my 7/16 cable... although it is tough to unreal the 90' of it!!!!
Ramsey 15,000 Patriot!!!!
The cable tension stays the same when you double up the winch cable through a snatch block. The winch does not know that there is a snatch block on the end, it will always pull up to max tension.
I thought you might since I copied and pasted yours...
Now it's official...
yep synthetic is stronger but isn't as abrasion resistant. though there are sleeves that can be used.
WLL is usually 1/4 to 1/5 of the nominal strength.
Class 6x19 IWRC (Steel Core)
dia. inch -- Nominal Strength tons of 2000 lbs EIPS -- Weight per foot lbs.
5/16 5.2 .18
3/8 7.5 .25
7/16 10.2 .34
1/2 13.3 .44
9/16 16.8 .56
5/8 20.6 .69
3/4 29.4 .99
7/8 39.8 1.35
1 51.7 1.76
1-1/8 65.0 2.23
1-1/4 79.9 2.75
1-3/8 96.0 3.50
1-1/2 114.0 3.96
also some good info - Billavista's recovery bible - http://www.pirate4x4.com/tech/billavista/Recovery/index.html
It looks like the stuff listed in the regs is basic wire rope - minimum strengths. I never looked that close.
I did find this site that gives details on a bunch of mounting hardware and aircraft cable, which most winch companies say they use.
I've been researching the stuff for a while. From what I understand the fraying is normal and doesn't affect the strength rating (this is the same with climbing rope so I trust the source). Though the protective sleeves are a good idea. Apparently the heat issue is for most makes of winches during powering out the line. Personally I never power out only in so it isn't a consideration.
As an aside I priced the Warn rope, holy shiat! $950 and thats Canadian! What a freakin' joke.
Check out winchline.com and also http://www.samsonrope.com/home/commercial-marine/faq-amsteelblue-mooring-lines.cfm it has some interesting info as well.
1) it may be a negligable amount or accounted for in the strength ratings, but its safe to say that fraying of a rope makes it weaker. Its fibers are what make it strong, if they are severed, it can't possibly have the exact same strength. The guys over on pirate who have been using the synthetic stuff for years consider it a consumable, and not just because you can sever the rope on a rock. At some point the fraying is going to get to the point where it will really affect strength.
2) Other than the 8274, most winches have their motors mounted right on the side of the rope drum. I don't know what operation causes the most heat in the motor (though I imagine a motor-stalling max strength pull would be it...) but if the motor is operating, its making heat... which is heating the drum... which is heating the rope. I don't think powering out is the only problem.
Definitely not trying to get into a pissing match as I only know what I've read and compare to my extensive knowledge of typical rope construction which is a different beast. Nevertheless much of my research follows these lines http://www.bb4wa.com/articles/amsteel2.htm
Also, from Samson the source of Amsteel Blue, "If taken care of, AmSteel-Blue should yield 2-1/2 to 3 times the normal life of wire rope mooring lines". Granted this is slightly out of context as it refers to mooring lines but it is testiment to the products ability under extreme use.
I'd love to hear from some that have used it before I make my purchase!!
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