New type of bolt #breaktest

[jeremyjames]

For those wondering 10 kn is equivalent to 2248 pounds, a typical climber is pretty lean 150 pounds-170 a 150 pound man falling ten feet with an arrester distance of one feet would be equivalent to 1650 pounds. So generally it would be enough a 200 pound man would be 2200 so thats pushing it, i wouldnt feel confident in this product securing me if i was a larger man.

[TRipleJP]

I typically have polished metal holes on the side of a mountain.
The mountain's porous rock will allow the glue and hook to bite down.

[skybox]

As a 230 pound man, I know enough math to know this is not for me.

[NotSure]

With adhesives there's something called "surface energy". It's an important part of how adhesives work.

[nathanielv.]

The measured force of failure of the glue (10.28 kN) is equivalent to 2311.036 lbf if anyone was wondering.

[Zogg]

I'd try to roughen the inside of that hole to give glue something to grip against. Maybe use a die grinder with a tungsten bur tool or a thread tapper that only leaves shallow grooves and not anything close to what you would see if you look inside a nut. What you probably want is the female version of the knurling that a metal lathe can create on a tool handle for grip. You might need to find someone who has a metal lathe and the ability to cut right and left handed threads on the inside of that block

[elischultes]

Having done some rock climbing, epoxied in lots of rebar and construction bolts, oilfield and farm work I’d say the problem was hole preparation. I’d say threaded holes cleaned out with a non residual cleaner ie. break cleaner or alcohol should give a more definitive result.

[MarkValascun]

It’s insane to me how dangerous a small amount of knowledge can be… everyone saying ‘that’s 2200lb’s of weight you can put on it’, you’re right… BUT you can’t move that weight AT ALL… a small falling man can generate well upwards of 1500lb from small 6-10ft fall with a shock absorber attached from his rope to the harness

[yoBradyO]

That Twisted bolt portion needs a rougher surface . Smooth surfaces are not good at all when using adhesives

[JD-gndu]

Try roughing up the insides of your holes and filling with glue then put your anchor in the hole. As someone who put a lot of all thread into concrete we also blow out the hole, brush it, and blow it out again.
By filling the hole first then putting your anchor in it allows you to get the most coverage from your glue/epoxy.

[winstonmarshall]

You’re using it on smooth metal the jb weld needs a rough surface to properly hold. Love your videos! Keep up the good work.

[OGJessie]

Aah tensional force the bane of my existence and my shoelaces.

[KiloFeenix]

I like his confidence in the quality of products sold at Home Depot.

[joebonomono]

Drilled steel gives a consistent surface to measure other variables against, glue types, serrations in the hook, etc

[BraydonAttoe-xsyg]

Every refinement and piece of information gathered saves that many more lives. Its dedication to the specific craft like this that produces true ingenuity

[Labyrinsky]

What if you tapped the hole to give it threads? It could give the glue something to bite

[collecthis]

Okay.... Time to give you all a little carpentry lesson! do not try putting hard on hard like metal on stone metal on concrete... metal in concrete. Metal in stone, or metal in metal try to hold it with glue that needs time to dry, that may never dry because of humidity, cap factor sealing, slipage, or any other unforeseen prevention. Always go with soft on hard or hard against soft against hard materials. A metal screw capped with wood peg insert it into concrete or stone or another piece of threaded metal would give you ultimate holding power. The physics work... The wood will always swell when wet, damp, humid or when any wet adhesive or glue is applied. Take that to the drawing board if you want to be safe. Peace... live life, have fun, be safe enjoy more, You're welcome from an old-timer. 👍💕

[Goosehughes]

Not to mention if you’re cementing it into a rock whole the strength is going to be far stronger then cementing it in a metal hole

[Austeoperosis]

I have a strong feeling the bend of the metal at the initial pull (it was angled slightly then bent into a nice loop) caused the twisted metal pieces to slide within the glue creating empty pockets and reducing contact area. I would imagine that would weaken it quite a lot. Your glue looks quite brittle so the smallest shift could cause a hairline fracture through it.

[GaugeSecor]

It's because the metal Is a good finish It has nothing for the glue to bite into.