Just don't hang an aider from that pin...
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Tethrd One Climbing Sticks
- Thread starter rabidd099
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In reality a 3/16 dia. spring pin is really strong in double shear, about 2500 lbs minimum depending on material when correctly in place. The limiting factor is more likely the bearing stress on the step and tube which depends largely on their thickness where the pin passes through.
Is anyone else interested in whether or not the sticks were tested to failure? And if so, what those failure modes were?
or does “it meets tma test standards” sufficiently cover a completely novel way to assemble a climbing stick.
I don’t have an answer.
I’d also like to see the same results for any climbing stick. It seems like knowing the point at which the sticks fail, and how, goes a lot further to informing people on their safe use.
or does “it meets tma test standards” sufficiently cover a completely novel way to assemble a climbing stick.
I don’t have an answer.
I’d also like to see the same results for any climbing stick. It seems like knowing the point at which the sticks fail, and how, goes a lot further to informing people on their safe use.
They had a prop of one tested to failure on the video. Tube bent.
I don't really trust TMA testing, and I don't particularly trust tethrd-presented testing either.
I do believe that the basic design is sound as long as things hold. Any realistic concerns would be long-cycle behavior, unconventional loading, or QA-related. The glue issue in particular raises concerns over QA - are the roll pins consistently installed in such a way that they can't/won't come out unexpectedly? Probably...but under what parameters and to what reliability? We've already seen what was claimed to be structural glue fail catastrophicly on multiple sticks...to the point that "alignment" pins are suddenly structural. That's a lot of trust to put on a single point of failure of what was sold as a non-structural item.
Passing TMA and testing one stick to failure isn't really a high bar, and doesn't really address the quality and reliability concerns.
Titanium hardness vs aluminum hardness..... come on man
I'd be my paycheck titanium and roll pin lasts 10xs longer than aluminum with grade8 over time...
I'm not for or against tethrd but some of the negative stuff is unwarranted
There's a chance they were being sarcastic. Maybe I'm being naive.
That was an honest question.... I tattoo for a living, I don’t play with metal. And yeah, I use aluminum sticks, with a bolt running through them, so suspect it would take a little more to work it’s way out.
I wish I was closer....I like tattoos...
The grade 8 bolt is probably stronger than the roll pin but the bolt hole will wallow/crack/fail in aluminum way easier/faster so it could be the strongest fastener in the world but if u fastening to soft material than it's a mute point
I like adventures, maybe I need to come to a city near you! Haha.
Stay outta here...I'm trying to leave...haha
Quick litmus test.....what is the best thing to put on ur tattoo during the healing process?
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Gorilla tape.
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Not superglue. It has its limits.
Mopar1169
Well-Known Member
But only the tube is titanium, super thin titanium at that. So if the glue fails the pin is gonna egg out the steps and probably the tube also from movement.
You in rocksonville?
I’ve been using Saniderm or Recovery adhesive bandage on people when I can or Aquaphor.
Correct answer could have either been preparation H or gorilla tape.....
Ok guys... again I'm not defending tethrd....I'm just showing u different metal characteristics. I don't have any titanium to test but I have stainless. Pretty good comparison between the 2 but titanium designed to be tougher than stainless.
.0598 vs 1/4...the holes are 1/2inch away from the edge. I drilled a 3/16 hole. The punch is larger than 3/16 so I tap tap to start and the sunk the punch to the hilt. Aluminum total fail and stainless major compromised but no fail.
Edit....stainless is grade 304l and aluminum 6061t6
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