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Tethrd One Sticks Gen 2

I still have not heard back from tethrd other than the automated email. I'll call tomorrow. I've used them a few times practicing with no problems. I'm only 150# maybe I'll just test them aittle harder at home close to the ground. By the time I get anything back it will be late season and if i send them back I just want a refund. There seems to be a lot of bad blood with teherd and members of the forum. I'm brand new to this and I already have a bad taste in mouth from the company.
 
I still have not heard back from tethrd other than the automated email. I'll call tomorrow. I've used them a few times practicing with no problems. I'm only 150# maybe I'll just test them aittle harder at home close to the ground. By the time I get anything back it will be late season and if i send them back I just want a refund. There seems to be a lot of bad blood with teherd and members of the forum. I'm brand new to this and I already have a bad taste in mouth from the company.

Just be careful and keep your ear to the ground on how it's playing out so you can be as safe as possible.
 
Just be careful and keep your ear to the ground on how it's playing out so you can be as safe as possible.
For sure. I'm hoping some real info comes out. If not from tetherd, a member of forum will find out
 
Well I tagged the guys I was aware of but someone deleted that post. I guess we dont deserve to know.
 
So far this threads been fairly clean from personal attacks, lets try to keep it that way. There's still some potential for useful life out of this thread so we'd hate to have to shut it down.

Also, aside from the fact I'm sure they're well entertained with other matters right now, the Tethrd guys are all familiar with the forum vendor rules and know they're not supposed to post customer service in this thread. Calling them out here will not result in a response so please refrain from it and don't expect it. Thanks!
 
There was a thread over on AT about these same sticks. It was pretty bad, but they let that go all the time. Then the whole thread disappeared.
 
There was a thread over on AT about these same sticks. It was pretty bad, but they let that go all the time. Then the whole thread disappeared.
12 ringer is pretty lenient over there which is how I like it. Must have gotten real nasty to have it removed
 
What process do they use to make the steps? Anybody really know
Looks like if they just increase the wall thickness of where the step interacts with the tube they won't fold in half like the 1 in the pic tried to do...if I had to guess, a crack formed at the roll pin hole and it did what aluminum normally does...no indication of anything out of the ordinary to total failure

98C494FE-3786-48B2-BF2C-C5D77AE31B29.jpeg
 
I called Tethrd today I was told there were some impurities in the casting of the stand-off and they have some reported failures. I asked how many failures but didn’t get a clear answer. They emailed me a shipping label and I dropped it off today at UPS. They said it will likely take ~10 days from my shipping date to be tested and returned or just replaced but they are targeting at least September 1.

In my opinion they are handling about as well as they can given circumstances. I had a step wobble on one earlier, and they sent me a replacement right away, with no questions.

Not sure I understand all the Tethrd hate on here. Aside from this all my experiences with Tethrd have been good. I wonder if all the haters bash Ford or Chevy this hard when they have a recall for an overseas part.


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The steps are machined not cast according to Tethrd's website. That doesn't make them free of impurities, necessarily, it would depend on the quality of the stock.

I'm curious about the testing. I suppose they are checking tensile strength, given "impurities", but from what I've seen fatigue strength of normal 6061 is like 1/3 the tensile strength. Cyclic loading being the issue.

I'd be interested to know what tensile strength they are testing them to, and what potential effect that might have on fatigue.
 
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The steps are machined not cast according to Tethrd's website. That doesn't make them free of impurities, necessarily, it would depend on the quality of the stock.

I'm curious about the testing. I suppose they are checking tensile strength, given "impurities", but from what I've seen fatigue strength of 6061 is like 1/3 the tensile strength. Cyclic loading being the issue.

I'd be interested to know what tensile strength they are testing them to, and what potential effect that might have on fatigue.
Yea ultimate tensile and yield are closer than steel with aluminum so if you are yielding during testing you are also likely failing.

The statement about impurities would have to be some awful chinesium stock to affect it so much so that it reduced the mechanical properties such that failure was a risk. And if it is then it wouldn’t meet an ASTM spec anyway. Impurities in machined aluminum isn’t really a thing. Sounds like a nice thing to say to customers who wouldn’t really know the difference.
 
Yea ultimate tensile and yield are closer than steel with aluminum so if you are yielding during testing you are also likely failing.

The statement about impurities would have to be some awful chinesium stock to affect it so much so that it reduced the mechanical properties such that failure was a risk. And if it is then it wouldn’t meet an ASTM spec anyway. Impurities in machined aluminum isn’t really a thing. Sounds like a nice thing to say to customers who wouldn’t really know the difference.
Pure conjecture on my part but the engineer in me can't help but offer this possible scenario. . . .

To me these steps would be a perfect candidate to be finish machined from a long extruded form. 6061 is a hardenable alloy that would require heat treatment, probably to a -T6 condition after forming to achieve the intended design strength. It could be possible that some subset of the extrusions missed the heat treat operation. That would mean they aren't strong enough for the application. Unfortunately this defect wouldn't be obvious to a visual inspection, it would take a tensile or hardness check to find. Once machined they'll all appear exactly the same. If this is the case its entirely possible that you could end up with a mix of heat treated and non-heat treated parts in the same assembly batch.

Before this degrades into more "Chinese sourcing" debate, be aware this can (speaking from personal experience here) happen with US sourced materials as well. It's easy to mis-route parts and miss a step, especially when there's not a visual indication.
 
Man I go on vacation to a area of the U.P. that has no service and you guys blow up the internet. Wow had about 19 pages to go through.

It is unfortunate they had a problem. Must of been pretty bad for them to issue a recall that is tethrd unheard of. Carry on I am too far out of the loop to get in on this one.
 
Pure conjecture on my part but the engineer in me can't help but offer this possible scenario. . . .

To me these steps would be a perfect candidate to be finish machined from a long extruded form. 6061 is a hardenable alloy that would require heat treatment, probably to a -T6 condition after forming to achieve the intended design strength. It would be possible that some subset of the extrusions missed the heat treat operation. That would mean they aren't strong enough for the application. Unfortunately this defect wouldn't be obvious to a visual inspection, it would take a tensile or hardness check to find. Once machined they'll all appear exactly the same. If this is the case its entirely possible that you could end up with a mix of heat treated and non-heat treated parts in he same assembly batch.

Before this degrades into more "Chinese sourcing" debate, be aware this can (speaking from personal experience here) happen with US sourced materials as well. It's easy to mis-route parts and miss a step, especially when there's not a visual indication.
That does seem like and easier screw up but I don’t recall what the mechanical properties of 6061-t0 is vs t6. And of course, any company is capable of making these mistakes, and they are far from uncommon. Sorry for the chinesium joke!
 
That does seem like and easier screw up but I don’t recall what the mechanical properties of 6061-t0 is vs t6. And of course, any company is capable of making these mistakes, and they are far from uncommon. Sorry for the chinesium joke!
No worries on the Chinesium joke, I would prefer all stuff sourced in the US. I'm just a realist who recognizes the cost impacts associated with that.

6061-O UTS 18ksi max, TYS 8ksi,
6061-T6 UTS 45ksi min, TYS 40ksi min

Difference is VERY significant.
 
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