Pictured is the hook that came on the 8274 I picked up. Without seeing a WLL on it, should I replace it, or do the other markings tell us the rating?
Pictured is the hook that came on the 8274 I picked up. Without seeing a WLL on it, should I replace it, or do the other markings tell us the rating?
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[M]ost 3/8 clevis slip hooks have a safe working load limit of 4000-7000 pounds. The average 8K winch exceeds the working load limit of these weak hooks regularly. Of course the safety factor built into the hook is 3-4X, but it is still not wise to exceed any working load limit of any hardware. . . .
That's what I plan on getting when I switch to synthetic line.I am becoming a fan of the Safety Thimble
The D is probably (changes with who made the hook) a hook type or material of construction identifier, the symbol below that I am unsure of. The 3/8 is obviously the size, but the size of what? Most likely the diameter of the pin that is holding the cable. Most (maybe all??) cable should have a thimble inside the eye or a pin that is at least twice the diameter of the cable itself. If you think about the construction (a version of hawse lay) as the wire rope is turned around an object and then loaded the outside strands are being stretched while the strands on the inside radius are being crushed. I know a good number of winch manufacturers sell wire rope without thimbles, I am just saying that it is not doing the cable any favors by being tightly radiused and unsupported...... just my opinion.....
So looking at their website, they don't ship to Canada... I'll have to see if I can find another source for one when the time comes.That's what I plan on getting when I switch to synthetic line.
According to Factor 55 (who probably copied the information from another company, but that is another rant for another day):
That gets so tiresome. Great, the WLL limit of a rated hook will be exceeded by the max pull rating on a winch. Okay, if you are going to throw out a WLL on a piece of gear, what is the WLL of the winch? It is patently unfair to the end user to use WLL of one thing and max rating on another to try and dictate a recommended load rating. If that is indeed the actual WLL rated for overhead lifting, the minimum breaking strength will be around 30,000 lbs. (I do not know if they have a different WLL for that hook, but I know that overhead is minimum 5-1 safety factor)
That gets so tiresome. Great, the WLL limit of a rated hook will be exceeded by the max pull rating on a winch. Okay, if you are going to throw out a WLL on a piece of gear, what is the WLL of the winch? It is patently unfair to the end user to use WLL of one thing and max rating on another to try and dictate a recommended load rating. If that is indeed the actual WLL rated for overhead lifting, the minimum breaking strength will be around 30,000 lbs. (I do not know if they have a different WLL for that hook, but I know that overhead is minimum 5-1 safety factor)
It's an apples to oranges situation.
Winches are rated by max pull instead of WLL because they stall out as opposed to snapping. They don't need to consider breaking strength, because they stall before they can break (if they are properly maintained). And since they are the component applying the force, they don't need to consider any external loads provided everything is rigged properly.
I wasn't, at all. Just lamentations over the frequency.Don't shoot the messenger. OP asked whether markings on a winch hook other than WLL will reveal its load rating. I did not know the answer but saw the "3/8" cast into the pictured winch hook so I googled "WLL of 3/8" winch hook"
and the very first search result was the text I quoted.
You really believe that the winch can't pull more than the rating?
WARNING
Always know the Working Load Limit (WLL) of your rope.
Never exceed the WLL of 10,000 lbs. (4,535 kg.) on VR, CTI, XP, Zeon and M8000 winches.
Never exceed the WLL of 12,000 lbs. (5,443 kg.) on a M12 winch.
A Little About Working Load Limits and Winch Cables
It pays to be super careful about how you use your winch and how you take care of your winch cable. Why? The winch cable supplied with your winch is undersized. Manufacturers often recommend a winch that's rated for 1 1/2 times the weight of your 4x4. But frankly, we think a lot of people wing it or get what their buddies have.
The actual force that your winch needs to generate is determined by:
And, very importantly, the majority of winching operations probably exceed the actual Working Load Limit (WLL) of the winch cable. Yes, really. WLL can also be described as the maximum allowed weight or the weight you are not allowed to exceed. The WLL of steel 5/16" cable is 1960 lbs. No joke. The breaking strength is 9800 lbs.
- The full weight of your rig, including you, passengers, gas/coolant/oil, tools, tires, spares, camping gear, armor etc.
- How badly you're stuck
- If you're tires can roll
- If you're on a slope
Why do manufacturers get away with this? Probably because we offroaders don't want to be lugging around huge cables or having another 30 lbs hanging off our front bumpers. We can also deal with this by using snatch blocks and double line pulls. But you should always know that your recovery operations can easily take you to the breaking strength of your winch cable.
We've been over this many times. You don't mix the WLL and design factors with an entirely different industry and its practices. First and foremost reason is the thing on the front of your bumper that turns and reels in line, is not a hoist. WLL are used with a 5-1 safety factor with hoists, not winches.A tag wired to the Spydura winch rope that came with my new Warn M8000S reads as follows:
Warn's product literature states that 3/8" Spydura is "for Warn winches with 10,000 lbs. (4535 kg) pull rating or less" and that it has a "breaking strength of 10,000 lbs." (3/8" "Spydura Pro" is listed as for winches with a pull rating of up to 16,500 lbs.) Warn does not list a "WLL" for their synthetic winch rope, nor does Master Pull or anyone else that I can find, so that leads to the question, if Working Load Limit uses a design factor to calculate a load limit less than the Breaking Strength, how the hell are we getting away with using the size cables and ropes typically found on a jeep?
As noted here:
See: https://www.roundforge.com/articles...e_About_Working_Load_Limits_and_Winch_Cables_
See also: https://www.roundforge.com/articles...ing_Load_Limit_vs._Minimum_Breaking_Strength_
Discuss.