AFS question

robinia

Participating member
Location
Ontario, Canada
I have a extra length of lanyard rope that I want to make into an AFS. It's 7/16, grizzly spliced on both ends, and came as a lanyard with the grillion from Sherrill.
What would be the best way of making one eye into the large ring?
I thought of using either a double locking steel HMS carabiner or a pear shape screw gate quicklink.
I was wondering about the safety of having the double locker rubbing on the tree and accidentally working itself open. Is that a valid concern?
The screwgate I would locktite and tighten with a wrench.

I've often wondered this same thing about making my own AFS prussics as well. It would be nice to just use an extra eye and eye rather than buying a new tenex one with the ring.

(and I'm not much of a splicer FWIW)

Thanks in advance!
 
MRs come in a lot of shapes and sizes. That's what I would use.

I've rarely ever tightened an MR more than finger tight. Using a real MR not a screwlink made in the Pacific Rim will get you a nicely finished thread cut. In all my years of using MRs I've never had one open or lock down. They do obligate the climber to a bit higher standard of care though.

If you do decide to use a wrench to tighten the MR be careful, over tightening will 'spring' the threads and make it weaker because the threads are bent. What I learned was to finger tighten first. Then note where one of the hex corners is positioned. Tighten by turning only one 'flat' and leave it at that. You know how much lift you can get out of a felling wedge, right? The incline plane/wedge/thread is the same principle.

If the eye in the rope is large I would seize the MR in place using at a minimum a constrictor hitch and some small cord. You don't want the MR rotating in the eye. Whipping the eye down would be nice too.
 
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I was wondering about the safety of having the double locker rubbing on the tree and accidentally working itself open. Is that a valid concern?


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For sure. I have a quad lock open up right in front of my eyes from the pressure of my weight loading the line.
 

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