Rigging Rings - Build your own @ home

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Don't even bother with the Brummels here guys, straight buries are fine, and actually are stronger.

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X2.
I have found this to be true first hand. There are times when locking Brummels are the way Togo, but not in a hitch cord.
 
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What is your cord size and target length?

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Im shooting for 1/2 stable braid I think I can get 4.5 feet (but Im better at figureing that when I start laying it out). I also have some 1/2 tenex tec comming as well if I dont like what the stable braid looks like (I was planning on straight bury for that if i went that route). Will see though when it arrives. Cant wait.
 
Retrieval

RS+retrieval.jpg
 
In work use, place the catch thimble between the rings, this will keep it in check and not be able to bind on the rope. But I'm not sure about the thickness, it might get bashed pretty good if it's that thick.

I need to look up the company i bought a whole bunch of very thin D rings. They've been great.

That thimble might work great though, you don't know till you try it.


I've just noticed that if the object is placed outside the rings, it can bind if close to the ropes diameter.

a brass snap with that same shape as that thimble doesn't seem to bind though, so your thimble might be a great shape for that use.
 
Leaving the retrieval item hanging below on slack line helps avoid binding. A brass snap that I used with the same max ID as the thimble seemed to bind more. The thimble with its extra space at the top seems to help.

Time will tell! Thimble sure was cheap though.
 
Nick is there a reason you didnt put a small x-ring on one end? I didnt notice they were the same size until you posted the picture of the retrieval set up. With mine I was hoping to put a small ring on one end and a large on the other. The rope will be a little small inside the large ring but it doesnt seem to me that would be an issue. I guess when it comes today (Yahaa) I will have to look at it to see.
 
The possive points Nick has with this are:
1. Basket form, so breaking strength likely around 44,000 lb load. (if spliced to manufact specs on tenex)
2. Can use up to 7/8" rope. 3/4" would likely be the biggest most people would use though. If he used the smaller ring (20x14) then 5/8" would be the largest size he could use.



Xtreme Arborist was out of the smaller 20x14 ring, but more are on the way very soon; Nick has a few coming.


I'm sure Nick will be building plenty more with multiple size rings.
 
The catch thimble is 5mm.

Flying Squirrel,

Like David mentioned I didnt have access to any to small rings when I made this one. Looking at the specs though I am pleased with this model. The smaller ring has a 14mm 'thimble groove' which means it wont take 3/4" tenex (assuming), also it has a total rope bearing of width of 22mm vs the larger ring @ 31mm.

Since my only load bearing concern with the build is bend radius, using the larger ring seems like the best choice.

A few people have asked me what I consider the SWL of the unit I put together and while I have answered 500-1000lb I honestly dont believe I could break it or an appropriately sized rigging rope during rational use.

With the large rings and 3/4" tenex it simply exudes strength and security.

David is right though, if I end up with some more XRRs I will definitely build some more units!
 
Nick,

I hope you have better luck with the retrieval than I did. Made me crazy.

The problem is easy for 5/8”, still easy on ¾” stable braid, tougher on ¾” tenex and impossible on 7/8” bull rope. Tenex is trickier than stable braid because it changes size under load.

True, the snap is less binding, but the thimble can be “fine tuned” for size. Pry it open very slightly for max clearance for the rope, but still catches the ball. But it really should be held perpendicular to the rope somehow and I couldn’t make that happen reliably. Maybe X has the right idea: between the rings, but there are other issues there too.

The other problem, especially as the rope get larger, is that the thimble can accidentally “scrub off” the ball prusik. This will not make you happy.

I finally gave up, couldn’t do it. I hope you have better luck.

The other approach would be to leave the FS alone and work on a retriever, but it certainly isn’t obvious what might work in this situation.
 
Simply pull the work line, replacing with a throw line. Tie the retrieval ball to the throwline with a bowline, retrieve.


Are you saying that once the sling is loaded it wont pull out of a crotch even if you have the catch snap caught because the tenex molds in there?
 
No, I was trying to make it work directly from the bull rope. My rig was heavier than yours (25' cordage plus block) and I didn't like pulling on my thin throwline. (That's why I used big fat ugly Slickline for the separate retrieval throwline).

The dimensions were so close, I found the change in diameter in the tenex depending on how much I was pulling, could screw things up. Just too tricky to be workable.

You're on a better path.
 
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The catch thimble is 5mm.

Flying Squirrel,

Like David mentioned I didnt have access to any to small rings when I made this one. Looking at the specs though I am pleased with this model. The smaller ring has a 14mm 'thimble groove' which means it wont take 3/4" tenex (assuming), also it has a total rope bearing of width of 22mm vs the larger ring @ 31mm.

Since my only load bearing concern with the build is bend radius, using the larger ring seems like the best choice.

A few people have asked me what I consider the SWL of the unit I put together and while I have answered 500-1000lb I honestly dont believe I could break it or an appropriately sized rigging rope during rational use.

With the large rings and 3/4" tenex it simply exudes strength and security.

David is right though, if I end up with some more XRRs I will definitely build some more units!

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Makes sence. Thanks for your explanation. For what I am looking for I think I will try it with the large and small ring. 5/8" rope is more than enough for me, I'll use a block otherwise (or a crane)
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. Ill try to post a pic tomorrow when finished.

PS. With 3/4 tenex breaking at 22,400 I believe your swl of 500-1000 is concervative. but good.
 
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Well here it is. It came out pretty good. Im happy. Now just gotta find the right size catching device.
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Looks pretty! Very nice.

For you few guys that build these, the breaking strength will be the breaking strength of the fiber you choose (if spliced correctly of course) and in the configuration it is put in, basket verses straight pull, vs choked versions.

The fiber will be the weak link no matter what.

28x20 large ring will start to distort shape a little around 17,000 to 18,000 lbs.

I forget off the top of my head the 20x14, might be 15,000 -16,000 lbs. I can look up later if you want it.

Not to be confused with actual breaking of the ring. They don't break; at least, we've never found a sling that would last that long, maybe if we put in 3/4" wire cable we could see the ring smash out till it got pinched off; never tried wire cable on one.

So, just keep in mind, the sling material properties will set the breaking strength and you can pick a 10:1 SWL from there.

Nice job guys.
 
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