Recommended winch "rope" size





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  1. #1
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    Default Recommended winch "rope" size

    I've acquired a new-to-me 4X4 with a Warn 14,000 lb winch sporting the usual steel cable. I'd like to replace the cable with the "Dyneema" Kevlar rope instead (and change the fairlead) but looking around I see there are now a lot of choices with differeing brand names and even composition to choose from.

    I'd appreciate input on what diameter rope would be preferable for a 14K lb winch (approx 6K Kg) and how much the various types of synthetic rope vary in strength.

    http://www.masterpull.com/difference...c-winch-lines/

    I may never use this winch in anger. I've managed to avoid using the one on my other 4X4 for over a decade, so I doubt things will change now. So this is not a "challenge" truck. What use it does ever see will be slow and methodical. Obviously given any type of rope, thicker wll be stronger and less will fit on the drum. But I would think 25 metres is plenty (I have a whole collection of the usual recovery equipment plus a 30M Dyneema extension). The vehicle is garaged, so UV resistance is not critical.

    So the questions are - which rope, which thickness gives the best value in this usage?

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  3. #2
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    Default Re: Recommended winch "rope" size

    The diameter for the synthetic rope they use on winches is as follows: 10mm for 13 000lb, 11mm up for 16 500lb, 12mm for 20 000lb.

    Not sure what material is that?!
    Last edited by JLK; 2019/05/24 at 02:30 PM.
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  5. #3
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    Default Re: Recommended winch "rope" size

    Yes but that will be for one specific type (possibly even brand) or rope (see the link for some info).

    Let me phrase it a bit differently - should I go for a more-expensive name-brand like Dyneema, or a cheaper generic and probably thicker rope at less cost per metre? The thicker rope will also fill the drum faster, so I will "need" less of it. (Although, obviously I can buy a shorter, thinner & stronger rope).

    There's quite a bit on eBay from China, but would you trust it? I will probably only ever use it to test function and maybe to help someone else. If it snaps, it's at least less dangerous than steel cable.

    Thanks!

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    Default Re: Recommended winch "rope" size

    Quote Originally Posted by JLK View Post
    The diameter for the synthetic rope they use on winches is as follows: 10mm for 13 000lb, 11mm up for 16 500lb, 12mm for 20 000lb.

    Not sure what material is that?!
    Looks like they use about a 50% safety factor, thus for 14000lb, you need about 21 000lb rope, what ever type. If not using everyday I will not go for the most expensive.
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    Default Re: Recommended winch "rope" size

    Go to Southern Rope in Paardeneiland, get 40m of GP12 8mm for around R1000 sometimes less. GP12 is dyneema without the trademark. Go onto youtube, do a brummel lock-splice. Don't pay R3-10k for a winch rope. If you want to go overkill get the 10mm. Ask for a rope sleeve for the section sitting on the drum and another 1.5m section near the hook. UV kills synthetic ropes so put a sleeve over the exposed sections.

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    Default Re: Recommended winch "rope" size

    Quote Originally Posted by kenskind View Post
    If you want to go overkill get the 10mm.
    Wouldn't 10mm be weaker than 12mm?

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    Default Re: Recommended winch "rope" size

    Quote Originally Posted by CanAmSteve View Post
    Wouldn't 10mm be weaker than 12mm?
    Yes and that would be weaker than a 14mm. But no. Synthetic ropes are actually stronger than their steel equivalent.

    https://www.southernropes.com/gp12/gp12/tech-spec
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    Default Re: Recommended winch "rope" size

    This is the reason I do not trust those synthetic ropes. The heat will get them.
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    Default Re: Recommended winch "rope" size

    Quote Originally Posted by Henkus View Post
    This is the reason I do not trust those synthetic ropes. The heat will get them.


    Could you explain how this happened?
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    Default Re: Recommended winch "rope" size

    Also not a fan. Mine gets used rarely, so I want the peace of mind that it will be good to go.

    I don't want to worry if it is going to perish in the sun.
    And I don't want to wash it if was used in mud.
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    Default Re: Recommended winch "rope" size

    IMHO if it's certified to work within the rated working load most applicable to your vehicle/situation then price should be the last thing to look at.
    The only difference the price would make is the process the synthetic rope has undergone to make it a bit more resilient to the sun or sand or abrasion but as someone previously stated that too can be overcome by a sleeve fitted at the end that covers the rest of the spool once the rope has been fully reeled in. Any cheap product can last as long as an expensive product with the right care and maintenance.

    To make a long story short if it's rated and certified to snap or break at 15t or 17t it's going to snap at that given tension no matter the price.

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    Default Re: Recommended winch "rope" size

    winches on vehicles do not comply with the machinery act. The ropes are specced right on the winched pulling capability with very little safety factor. You should be ok with a 12mm rope, But I will go 16.
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  20. #13
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    Default Re: Recommended winch "rope" size

    Quote Originally Posted by Henkus View Post
    This is the reason I do not trust those synthetic ropes. The heat will get them.
    Well, I have a friend with a winch and steel cable and when he last went to use it, the cable was rusted together quite well. Nothing lasts forever and I would say that rope got a fair bit of use. Everyone's situation is different, but while some use their winch every weekend to "play" getting unstuck, I with luck will never use mine. And if I do, I will not be in a hurry. So why lug around the extra weight of steel and the inherent risks (at breaking) of a steel cable? I'm also storing the vehicle under cover, so UV is not really an issue.

    I do agree that within reason, I'd rather have a stronger/thicker rope and live with the shorter pull. Thanks!

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    Default Re: Recommended winch "rope" size

    Quote Originally Posted by Racer-X View Post
    Could you explain how this happened?
    Heat from the brake of the winch. This one was used just to load a ski boat.
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