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anchor shackle as a pulley

Discussion in 'Climbing and Rigging Equipment' started by Haplo, Dec 31, 2018.

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Would you use an anchor shackle as a pulley?

Poll closed Monday at 9:57 AM.
  1. yes

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  2. no

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  1. Haplo

    Haplo New Member

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    is there any reason why I shouldn't use an anchor shackle as a pulley? If i'm pulling a tree over, and the bull rope is going through a block on another tree and back through a mid-line bowline for a 3:1 pull, I want to put the shackle on the bowline so there's no rope friction at the bowline. Something like this has a 6500 lb WLL. And it's only $27. Why not use one on the anchor point also?
    shackle.jpg
     
  2. Yarz

    Yarz ArboristSite Lurker

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    It'll work, but watch the bend radius and check how smooth the area where the rope will be running is, especially if being done on a regular basis.
    I used a similar shackle once for a redirect of a pull line when I didn't have a proper block. We pulled with a vehicle, though, so I can't tell you how much it reduced the friction.
     
    Groundman One likes this.
  3. Groundman One

    Groundman One Star Gazer

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    Yeah, the bend radius is an issue. So is the smoothness of the metal and whether it will fray the rope.

    Also, if it is a screw in shackle, and not retained by a pin, the force of the moving rope with weight on it could cause the pin to unscrew.
     

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