The only thing I can think of is the chain was softer than what it was attached to?
Is a graded chain supposed to be hardened?
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Chain wear
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The only thing I can think of is the chain was softer than what it was attached to?
Is a graded chain supposed to be hardened?
Wow that's considerable wear, 2 of those links look to be beyond serviceable limits IMO
I would get your warranty, if no one else has complained it's possible you received chain from a batch improperly heat treated
Grade 70 is heat treated and hardened to some degree
I would get your warranty, if no one else has complained it's possible you received chain from a batch improperly heat treated
Grade 70 is heat treated and hardened to some degree
140mower
Don
Yikes ... Chain twist is about the only thing I can think of that would put that kind of wear in....
I wish I could still say that made in the USA meant quality, not a political statement, just an observation as a consumer that often gets to do some comparing to some of the offshore offerings along side of the other.
One thing that you need to watch for is, "made using global components". I take that to mean that it's assembled there.....
I wish I could still say that made in the USA meant quality, not a political statement, just an observation as a consumer that often gets to do some comparing to some of the offshore offerings along side of the other.
One thing that you need to watch for is, "made using global components". I take that to mean that it's assembled there.....
Grade 70 is hardened, but it's also a better stronger grade of steel.
Lucky you can get warranty. But I'd also be looking to see where those links were and how they were rubbing. That's well beyond what I would consider safely within its rating.
Glad you noticed it though!
I dragged a baler wrapper combo out west. It's hard to describe but on each axle I just tossed a chain over the axle (the chain in question on one side, and it's twin on the other). Two more chains hooked to where the baler had chain points (per manufacturer stickers) and one more on the tongue. So whatever a Claus baler wrapper weighs I had 5 chains on it.
I have hauled numerous balers and have never had a chain wear like that
That's what's bugging me, is I like to think I mostly know how to do my job, and I thought I was doing well to upgrade some gear, by cycling in some new stuff
I have hauled numerous balers and have never had a chain wear like that
That's what's bugging me, is I like to think I mostly know how to do my job, and I thought I was doing well to upgrade some gear, by cycling in some new stuff
Dan Dubeau
Ultra Member
You are. You caught it. How many guys out there running, wouldn't? Until it was too late and bad shit happened.
I don't know enough about chain to even have a guess, but it's not unheard of for poor quality stuff to find it's way out the doors of otherwise reputable manufacturers. There's usually a pattern to this, and if that's the case, I bet yours would not be the only batch. There's also a lot of counterfeit stuff too. Chain though? Maybe?
When I first saw the pictures, i thought you were going to say that you used an angle grinder on it - and since that was too slow, looking for a faster method to cut through the chain
without looking up the exact specification, this type of steel is meant to be 'tough' more than 'hard'. Maybe if the load was loose and kept shifting back and forth, but for new chains, that's a shock
The load ratings on this type of chain are extremely conservative. In part because, as you said, no one who uses them really knows how much any given load actually weighs. And while you noticed the damage this time, there will be times when you can't see it. And there are also guys who know the chain is bad and use it anyways ...
without looking up the exact specification, this type of steel is meant to be 'tough' more than 'hard'. Maybe if the load was loose and kept shifting back and forth, but for new chains, that's a shock
The load ratings on this type of chain are extremely conservative. In part because, as you said, no one who uses them really knows how much any given load actually weighs. And while you noticed the damage this time, there will be times when you can't see it. And there are also guys who know the chain is bad and use it anyways ...
The company in question, makes and tests rigging gear. When I say I trust their choices in sourcing suppliers, it's because they in house abuse stuff and can certify gear for rigging. I've literally talked to the owner and been shown the facility first hand
I'm hoping this was a fluke, both for my sake and any other customers buying the same chain. I deal with two suppliers for rigging gear because they supply better quality than other places and hopefully they can still trust their supply chains
I used to work with an engineering firm that was a member of the CSA Standards committee. They figured 30% of the fasteners sold in Canada were fake. I’ve personally seen signed and stamped mill test reports and valve pressure test reports that indicated the suspect valves had passed comprehensive pressure and shutoff tightness tests. I would have believed them, except the fully-compliant valves were missing the seat discs.
One company I worked for lost a couple of hundred thou in court when the high-quality marine-grade 316L stainless steel pipe fittings we sold were actually low-grade 304. But the mill test reports were really spiffy.
explore.research.ufl.edu
I’m not blaming your chain supplier, unless they proof test 100% of the products they bring in its almost 100% certain that they will receive inferior products, either by mistake or by bad intent.
One company I worked for lost a couple of hundred thou in court when the high-quality marine-grade 316L stainless steel pipe fittings we sold were actually low-grade 304. But the mill test reports were really spiffy.
Buyer Beware: Counterfeit Materials
Buyer Beware! Counterfeit construction materials are flooding the U.S. market.
explore.research.ufl.edu
I’m not blaming your chain supplier, unless they proof test 100% of the products they bring in its almost 100% certain that they will receive inferior products, either by mistake or by bad intent.
Martin w
Ultra Member
Was it one chain that had wear, or all 5?
Glad they warrantied it. I am assuming it's a bad batch from the manufacturer. Hard to imagine though. That means there are probably hundreds of feet of poor-quality chain out there criss crossing the country. Good that you are vigilant.
Glad they warrantied it. I am assuming it's a bad batch from the manufacturer. Hard to imagine though. That means there are probably hundreds of feet of poor-quality chain out there criss crossing the country. Good that you are vigilant.
Just the one
No, I didn't think to at the time. Hindsight is great
As a millwright I used a lot of chain sling for lifting loads. Each chain had an attached metal tag indicating manufacture and grade. Grade 8 was a minimum requirement. Cant remember exactly but I recall every 5 or 6 links 1 would be stamped M8 or just 8 indicating the grade.
More expensive than truckers chain, but you get what you pay for. The chain in the photos tells me that there's a quality issue. I've only seen a couple of chains ware like that, most would have stretched links.
More expensive than truckers chain, but you get what you pay for. The chain in the photos tells me that there's a quality issue. I've only seen a couple of chains ware like that, most would have stretched links.
historicalarms
Ultra Member
I have drug sced 70 chain down a gravel road for a mile or two too take the rust off without it showing that much wear...Im betting that the boomer hooks prob pinched the links they were hooked into on your chain, also betting there was an equal "wear pattern" on the bailer where that piece of chain was in contact.
Since the chain must come out of service - it is, IMO, a no brainer to do destructive testing and verify the chain quality.
I have a half dozen grade 70 chains and traps. They were used for hauling 15t rock drills for many years. Never saw any damage like that. Great that you caught it.
I have a half dozen grade 70 chains and traps. They were used for hauling 15t rock drills for many years. Never saw any damage like that. Great that you caught it.
Yes, the tire on the axle by said chain. But I think I had ratchet binders to mitigate bouncing. Likely even with ratchet binders there's still some flex due to the tires
I was imagining a cyclic movement of the chain for thousands of miles. A tire in the formula adds lots more opportunity for movement.
For argument sake, picture an eccentric cam pulling on a chain at low frequency for 2000 miles against another hardened object - maybe a hardened high strength bolt head. It's not hard for me to imagine a result like that.
I like @CWret's idea of testing the chain. The fact that two adjacent links are worn implies that the rest of the chain is similar.
I could see that, actually.
My argument was (aside from paint damage on freight) I don't generally worry about damaging chains. I'll use corners or padding to protect what I'm hauling, I've never used anything to protect my chains.
I guess I could take the chains back to have them tested, I don't know the cost but it might be an interesting comparison between one of my old ones the the two new ones. That's how rigging gear gets certified