I experimented with more text on screen to see if it helps the audience follow along with either MBS or the results or which test we are on. What do you think? FYI: the chart of data is on the blog www.hownot2.com/post/rappel-ring Check out our new store! hownot2.store/

Off brand Titanium #2 creaked in the rhythm of the Super Mario Bros theme before it broke!

I love the perfect Mario theme beat at 5:40 Good job setting it up to make sure that exact sound happened! Nintendo will now be in touch through their lawyers.

Thanks so much for breaking one of my Anchor Rings, guys! That's something that I've never managed to do as my load cell is 'only' rated to 50kN, with an allowance that it can be taken to an absolute maximum of 75kN 😊💪

I’m a member of a U.S. Army Rescue team. I love watching your videos and sharing them with other Soldiers. A lot of your videos definitely help build confidence in our newer members. So thanks!

Those Fixe steel rings are impressive. Those are the same ones that are on the bottom horizontal ring of those vertical chain anchors. Next time I hear somebody grumble that the ring is not redundant, I’ll be sure and remind them of your testing. 👍

how on earth are you not breaking anything else in there under these insane forces? "holy s&*t" indeed. also, Bobby makes me so happy, he's the best

Stress testing should be an industry standard. This stuff is all too common. Thanks for reintroducing these facts!

more arborist gear!!! we need it !! friction savers, fisherman’s knot, friction savers

I have never done anything to do with rappelling or anything related in any way, but KZfaq recomm3nded this to me and I found this super interesting. Thank you guys for amazing content

If you pulled the first titanium one slower you coulda probably made it even more elongated. Strain rate hardening vs strain hardening etc etc

as an aero space welder im surpized that the welded stainless rings were not 100% penitration welds. Which is why it failed on the weld joint and no somewhere else on the ring. If it were 100% penitration and broke on the weld you would have seen solid metall all the way through and it looks like you could see the flats or the bevel of the parent ring matterial. Of couse it meets the kN rating that its designed for, but if they were to weld it with 100% penitration i bet it would contend with the forged rings.

The thing creaking to the rhythm of the SMB theme at 5:43 made me crack up a bit

i love how fast you guys shift over to the next frame instead of DRAGGING IT OUT SO LONG!!! love you guys instant sub!

The welds on the rings would seem to be less likely to fail if they were welded in an oval shape (like chain links usually are). The one y'all tested with the weld on the anchor didn't hinge open like the ones with the weld on the anchor. The anchor tended to make it pull uniformly across the entire weld instead of stressing the inside edge first. If those rings were ovals, the weld would tend to pull on all parts of the weld. Worth testing?

This was really interesting, it does make a lot of sense they the forged stainless performs better than the welded ring but I was very surprised with how much better and how the position of the weld matters.

Amasing video, really nice to see rappel rings being actively tested by other people than the companies that maked them

Love seeing Bobby back in a video! Awesome classic break test video and super informative. Thanks!

Great thoughts within the last part (and, the entire video as always). I have honestly never considered that there could be environmental impacts with some of the (arguably) small pieces of gear we leave on rock. I'm going to keep this in mind for the future, I don't often re-bolt / change out hardware myself; but it's really nice to know in any case. Perhaps I'll find something like that one day, and be all the wiser about why it may be harmful. Awesome stuff as always guys, you're constantly making our community a better place.

Good titanium alloy. I've never seen it pulled like taffy before. Your pulling rig is impressive.

Who else heard Mario at 5:43?

For anyone who doesn't really know what a kiloNewton is, the last ring broke at around 300lb, or your average obese person. The strongest ring however would have likely held around 22,000 lb, which is about the weight of a semi (without the trailer)

Tension vs shear loads in welds. Pretty obvious. Also: Buy once cry once. Spend the money for Ti or forged steel and fear not. Rolled AL is cheap but wears incredibly quickly.

There's been some commotion about the welded steel rings overhere, where cracks in the weld would mean sure death. So I was wondering what force a cracked ring would still support before it opens up. Could you cut a couple with a handsaw and test them please?

Hi, I’ve done a bunch of blacksmithing, so I know a bit about metals. I think the titanium is not getting hot because of the force, directly, but because of the deformation done by the force. That’s why the steel didn’t get as hot! It takes a lot of energy to move metal, and when it does move all of that goes into friction/heating

So at 7:50 I think what we are seeing is a non-penetrating weld on a tongue and grove style closing. The maker put a slit in one end of the rod, ground the other end into a wedge shape, then welded along the circumference. I believe you can clearly see the slit in the middle through the opening in the center of the welded lighter colored zone. I believe you can also see the remains of the wedge tip barely maintaining weld on the right hand top although the straightness of the leading edge has been badly warped as it was pulled out and apart. I'd like to know because metallurgy is fun and exciting.

Thank you so much for doing these tests. It helps validate manufacturer data and shows some of the results of sketchy practices.

Interesting. Also very informative! Thank you for the info on why/when Titanium (I am guessing it is a lot more $) should be used, and the problems of Galvanized (Zinc coated) stuff left alone in nature.

“how’s my hair” MAJESTIC

I don't need or use and anchor ring and I have no idea why I'm watching this or how it got recommended for me, I will say this watching a machine snap different types of metals and the process was super awesome watching, I enjoyed this video. 😀

the way that titanium stretched was insane and just a testament to its strength

its good that people are doing their own tests this way like you guys do, since not every manufacturer is as transparent

Pulling on the weld was the reason why it broke at 89kN. Pulling against the weld was why the other 2 broke around 50kN +/- . Of those 3 rings, the 2 50kN +/- rings that broke while being pulled against the weld showed deflection before folding inward at the weld. The 89kN ring showed no deflection and simply stretched until it pulled apart the weld.

Welded 304ss breaks because weld seam is bending and it cracks it open from inside first. When weld seam is agains shackle the round shackle keeps the seam better in its original shape and is a lot stronger

Very cool video, I loved how it was puking excellent info out

Love how you just faded out the rant at the end :D

I'm not a climber, nor have I ever needed to rely on this sort of gea (just here because of the algorithm), but I do have a topical understanding of how not to die when hanging from stuff and that worn rolled ring absolutely flabbergasted me! Why on earth would anyone allow their gear to get to that point?!

If I had to guess with the welding issue, when you were pulling on the weld, the force was on a small fraction of the weld, since the inside of the ring has the least surface area. But when you were pulling against the weld, it was being pulled into a straight line, while the weld wanted to remain a wedge. The result is the inside edge of the ring was being pulled much further than the outside edge, which you can see around 6:50. You can also see the 'tear' traveling up the weld, until it reaches around the half way mark, where it flies apart. The end result is, the first weld only has to keep the two sides of the ring close, while the ring does the heavy lifting. The second weld has to help take up the strain of the heavy lifting directly.

What the hell is this? You got me cheering for metal rings?!?!? My god KZfaq algorythms, you did it again!

The weld orientation does matter. In the first part you’re applying pure axial loading to the weld as the shackle keeps the weld orientation in place. In the second orientation you’re applying axial and bending loading to the weld, the bending loading occurs due to the deformation of the ring changing the weld orientation, this causes the weld to shear easier.

Thanks! Epic insight as an arborist

Bobys hair is exceptionally stunning in this video

Really interesting metallurgy lessons to be learned here!

as a person who has done tig welding, including screwing it up, I can confirm that in your case, it was NOT weld quality, but rather where you were pulling on it.

This just showed up on my feed and I know nothing about this or what’s going on. But im enjoying my self, I feel relaxed.

I am not sure if I am more impressed with the force required to break that titanium one or the deformation it survived before snapping. The chinesium ti was a surprise.

i don't do any climbing or repelling or anything of sort but this video was super useful information when comes to strength and metal rings i should use if i ever am in situation to do thous things or take family out to a local place i can look to insure my saftey and make sure resort or event i'm at has my safety in mine thanks guys for making this video!

full value video! i personally think it would be cool to put a rating of when it deforms too.

I just like watching people break stuff !

Great video!

such a dope vid thanks guys

5:42 IT MADE THE LIL MARIO THEME XD

At what force does your machine top out at?

Great content did I miss the Dan Osman video you guys did. I saw the 5 minute one but was hoping to see the whole set up and jumps.

Watching the titanium change colour before breaking was really interesting.

that titanium breaking was nuts

It looks like the welded stainless broke early because the weld was "straightened" and kind of sheared it, causing it to split on the side and then break early. Pretty wild how well they do with no welds!

very informative video. Most of my climing was underground. Have you guy`s ever tested climing rope? I have some BlueWater 2 that i just pulled of a spool that i have had in a box from the mid 80`s. Looks perfectly fine to me.

Was wondering if we’d ever see Bobby again. Good to see him back in the vids.

That broken Ti one looks like it'll make a kickass bottle opener!

The reason the rolled aluminum bent and the solid aluminum (almost certainly machined or cast not forged since aluminum can't be forged using traditional processes because of how aggressively it oxidizes) snapped is because different aluminum alloys have vastly different levels of brittleness.

7:25 the placement of the weld will affect the strength. The amount of force on the pull zone vcs the middle zone is diferent.

While hiking with a church youth group 20 years ago The couple that was leading the group were very into climbing, even taking us climbing indoors... I borrowed their equipment to do a presentation for English class. But one time on an outdoor hike they were able to point out Chains and carabiners bolted to the rock faces for various routes alond our hike.. What stands out is how well They were hidden as to not Be seen.. They were all spray painted the same color as the rock and blended in perfectly. Along our hike there was even a step made of concrete to make a particularly difficult part easy... This was not made by the BLM as I suspected, Rather I was told it was done by climbers Who actually hiked up with concrete and water And made that step for themselves and everyone else.. For the last 20 years I've known to appreciate The time climbers put into managing their routes so that most will never know or notice the chains on the rock face.. it's still very cool to see them when I do, which isnt often..

1:19 Jokes on you bro. I'll go straight to the end. Scroll bar is there for a reason 💁‍♂️

Very cool!

Just so y'all know on the steel 304 rings with welds. Those broke the way they did because of weld normalization, and loading. Likely the rings weren't heat treated properly to normalize them after being welded, which leaves weakened areas around the weld where the heat from being welded embrittles the metal. This creates a material situation where laterally loading the weld will cause it to fail very quickly, while axially loading it doesn't cause as much of an issue. The difference being the in one the weld is being pulled against, in the other the weld is being pulled across it's length. Because the steel (I believe) was not normalized you will see small steel fragments all around that area, they will be extremely hard, but brittle like glass. Oerhaps try taking one of the 304 rings and leaving it in an oven or hot area that's above 500 degrees for 8 hours, then slowly letting it cool down (this allows the crystalkine structures of the steel to reform and become more even throughout the piece of metal. Thus getting rid of most internal strain induced fracture zones)

at 7:00 your buddy explained it perfectly, the way you position the ring drastically changes the internal stresses on the weld, more force was being concentrated on the weld as the ring deforms on the second "lower strength" sample. The welds are more than likely the same strength. Welds should not vary that significantly!!

i dont even know what these are used for but its interesting so im just gonna subscribe

This makes me happy

I don't know, I think 3,300 pounds is a lot. It's lower than the recommended minimum for climbing and I'd always buy something better. But I wouldn't worry too much that I was risking my life if I had to use one in some unusual circumstance. Very educational! I'm surprised at how good the titanium is. Stretching before breaking is a very good thing. More energy absorbed. The solid aluminum rings are fine, but the brittle fracture is a little less confidence inspiring. Great video, and I think it's pretty clear you know what you're talking about!

No PETZL Open Ring? The P28 model that has a bolt to secure the gate. These come on their Arborist harnesses and can be installed after a splice is completed. Only ring I've seen that is made like this. I'm always orienting the gates where no force is directly applied. Even though their advertised as multi directional.

5:42 I swear to god I heard the da da tu duh da ta

lol the fade out on slack line ramblings

Good show!

5:42 funny mario sound

I've worked with TI for many years. Many people think its hard, which its not, but its tough in that it stretches and its very hard to break. Its almost as strong as Steel at half the weight.

You just had a new subscriber for the brown stains joke, congratulations

Love the leoni meadows camp coat.

5:42 I hear it everywhere 😂😂

I think if you’re just starting to slackline, rolled aluminum is fine. as long as you’re not rigging long lines (less than 50 feet), but only if your metal gear is backed up. I always go around the tree with the tail of the webbing and tie a bowline on a bight to my line locking carabiner. That way even if the ring snapped, no metal would come flying at me. Good thing about rolled aluminum is that it’ll bend before breaking, so hopefully you’ll spot it

That strongest ring just decided to pull an uno reverse card on ya

5:43 lol, super mario! 😂

Thank you very much for the great video. Where can I purchase titanium rings and forged stainless steel rings. Thanks.

It was definitely the way you were pulling on the weld that caused discrepancies. With the shackle against the weld it couldn't be deformed nearly as easily as with the welded area free floating

That the weld broke on difernt stregth proabably has to do how you pulled on it. On the first one, you pulled it inwards, or together. That means it was not stretched a lot, and basically forced into itself while only a small outer part of it was stretched. On the second one you pulled it outwards, forcing it apart. Meaning, a lot of the weld was stretched and pulled apart. Which actually makes a huge difference on how much it can take. Because a weld can take much more compessive load than tensile load. It´s down to the weld disrupting the crytal structure and intruducing nucleation points for fractures. If you press on the weld, that won´t really do a lot of difference, but if you pull on it, it offers starting points for dractures to form and noticably weakens the material.

The welds would hold up differently depending on where you pull from. In the one test you were pulling the weld apart and on the other you were putting pressure directly against it.

VIDEO IDEA: you have to get slabs of different types of rock and figure out their breaking points. I can trust safety rates equipment but what about various types of rock? Doesn’t matter how well the gear holds up if the fracture the rock Or break off.

Damn!!! I was instinctually covering my eyes for the Ti ring.

Good and interesting video.

Interesting is the elongation of the titanium which is helpful to spot any overload way before it will break.

The two stainless rings broke at different pull lvls because of the placement of the weld in the test. The first one had a higher strength cause the weld was being pulled in the direction of the weld. The other one was against the weld.

I watched the titanium break three times and still felt the need to safety squint every time.

Im gonna be honest that forged one was freakin epic

Do you think that putting stress on them all at once is different then wear because the stress test makes it Heat up and wear cause micro fractures over time which makes it much more dangerous and hard to tell if it's safe. If it was stretched out then you would know for sure. I am just assuming and curious.

Is there another variation on the linelock that uses a rectangular ring with a saddle-shaped pin/blocker ? Even if it's only rated for a hundred kilo (like the samples I used to have) it would be great for tying things down for the winter. -Years ago- in the 90's; I got a sample of one-piece *nylon* line locks ("for shipping and storage") that held two ends of lashing/strapping while they were tensioned. Each piece had pairs of integrated pins suspended by flexible hinges, shaped to nest *onto* a rectangular ring, instead *into*/through it. This avoided any leverage/collision concentrating force into deforming the ring while keeping the webbing flat. Having seen your demonstration, I think I may have been the only one who completely ignorant of how line-locks _normally_ work, read the instructions instead of 'clipping off the sprues' in the test group. (One in particular who ask me to show them how I'd fastened a set, got very angry and started shouting about how I'd done it 'dangerously wrong' and cut the hinges before becoming even more frustrated and hacking wildly at the 'incorrect' instruction-sheet when the demonstration loop didn't fail-apart under-load as he'd expected.) When I tried to get more, the (intermediary) for the company that made them told me that because I was the only one who had _any_ measure of success that didn't work for the MFG; no more would be available.

I genuinely have no idea how or why youtube recommends me so many climbing/repelling based videos lol the experiments were super cool and I hope my nephews watch you guys for tips but damn youtube, showing the diagnosed extreme acrophobe isn't gonna make people much revenue in the long term XD Anyone who can climb and talk about climbing as nonchalantly as you guys are like the bravest people from my P.O.V, I can't even stand on step stools without crying XD even with ropes and harnesses I damn near wet myself on a high ropes course in high school when forced onto one.

5:42 - Mario theme

It’s crazy how casually rope can hold this much weight

Maybe you guys could do a video on the likelihood of a back clip resulting in unclipping. I know this isn't the typical stuff you guys do, but with the drop tower it's something you could do.

Yes is does matter on how you pulled the welds replay in slow motion the one with the weld in the middle it separates the weld on the bottom so it was like tearing a piece of paper from one side to the other