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  Topic Review (Newest First)
3 Weeks Ago 10:59 AM
IStream
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by Minnewaska View Post
I'm not suggesting galvanic corrosion. I'm concerned that the mated galvanized surfaces wear against each other. It's not likely that the bolt tolerances will fully prevent all movement, when set in the seabed. I think it would take less than you could see with the naked eye to wear through galvanization. At the least, I expected some response that this was tested. Instead, we heard there is a lifetime warranty.

As I think about it, their stainless steal model makes less sense. The bolt holes and mating surfaces are ripe for crevice corrosion, one would think.
I think SS anchors, one piece or multiple, are a bad idea all around but I'm still not seeing this as a problem with the galvanized design. Even if you assume that the clamping force of the four large shank-to-shovel bolts is insufficient to prevent relative motion once the anchor is set, I think at most you'll get a one-time slip of the two parts. The load may be cyclic, but it's also essentially unidirectional and once the clearance is taken up, there's nothing more to give. If this is a big concern, you can just re-torque the bolts after the first use/season/squall and call it good.
3 Weeks Ago 10:40 AM
MastUndSchotbruch
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by Minnewaska View Post
...

I did buy and return their chain hook. It was a great design, made very poorly.
Hm, don't know what happened with the hook you got. I bought their chain hook, in stainless steel, and it is beautifully designed and made.

They even sent me their locking plastic piece, which did not exist at the time I bought the hook, free of charge! I did not install it (yet) because it does not fit under the shackle I currently use. I may replace the shackle.

I don't have a Mantus anchor and I don't intend to buy one at this time but my experiences with the company were nothing but positive, both with the quality of the one product I bought from them and with their customer service.
3 Weeks Ago 07:28 AM
Minnewaska
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by aloof View Post
Yes. A stainless anchor with bolted joints is asking for trouble. But then again the candya** yachties that buy stainless anchors can simply direct their boat boy to disassemble and polish the anchor after each use. A galvanized joint is usually ok. Common with shackles and such. Galvanizing has a way of protecting surfaces nearby.
Screwed-in galvanized shackle clevis, of course. It is the first place to grind away the galvanization and corrode, no?
3 Weeks Ago 03:00 AM
aloof
Re: Those new fangled Mantus Anchors..Bought One...Why

Yes. A stainless anchor with bolted joints is asking for trouble. But then again the candya** yachties that buy stainless anchors can simply direct their boat boy to disassemble and polish the anchor after each use. A galvanized joint is usually ok. Common with shackles and such. Galvanizing has a way of protecting surfaces nearby.
3 Weeks Ago 10:07 PM
Minnewaska
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by IStream View Post
Minn, what's the source of your concern? As long as the two galvanized parts are made of the same material, there'll be no galvanic corrosion and as long as they don't move relative to each other, there'll be no wear. Am I missing something?
I'm not suggesting galvanic corrosion. I'm concerned that the mated galvanized surfaces wear against each other. It's not likely that the bolt tolerances will fully prevent all movement, when set in the seabed. I think it would take less than you could see with the naked eye to wear through galvanization. At the least, I expected some response that this was tested. Instead, we heard there is a lifetime warranty.

As I think about it, their stainless steal model makes less sense. The bolt holes and mating surfaces are ripe for crevice corrosion, one would think.
3 Weeks Ago 10:56 AM
IStream
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by Minnewaska View Post
I don't have a thing for them, I've wished them the best. I'm just not a fan and offering another point of view. There's plenty of folks worshipping at the Mantus alter that a counterpoint isn't going to change much.

Unlike the potential that a product is made incorrectly, such as with inferior steel, I feel I've identified a design defect. Permanently squeezing two galvanized surfaces against each other, doesn't make sense to me. I've also said that it would be a great secondary anchor, as usage would be limited and it would be disassembled more than assembled.

I did buy and return their chain hook. It was a great design, made very poorly.
Minn, what's the source of your concern? As long as the two galvanized parts are made of the same material, there'll be no galvanic corrosion and as long as they don't move relative to each other, there'll be no wear. Am I missing something?
3 Weeks Ago 06:53 AM
Minnewaska
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by smackdaddy View Post
Oh please. Like bent shanks, or inferior steel?

Dude, you're really stretching here. Why do you have such a thing for Mantus? It's a freakin' great anchor at a great price with great customer service.

'Nuff said.
I don't have a thing for them, I've wished them the best. I'm just not a fan and offering another point of view. There's plenty of folks worshipping at the Mantus alter that a counterpoint isn't going to change much.

Unlike the potential that a product is made incorrectly, such as with inferior steel, I feel I've identified a design defect. Permanently squeezing two galvanized surfaces against each other, doesn't make sense to me. I've also said that it would be a great secondary anchor, as usage would be limited and it would be disassembled more than assembled.

I did buy and return their chain hook. It was a great design, made very poorly.
4 Weeks Ago 01:23 AM
TakeFive
Re: Those new fangled Mantus Anchors..Bought One...Why

I actually think that Minne's concern about the screws causing damage to the zinc coating is potentially a valid concern. And if it bothers you, there are the other one-piece welded anchors available.

But I still think that Mantus' multi-part design makes it much less costly to honor warranty claims. If someone has a bent shank, just send them a new shank, not a whole new anchor.
4 Weeks Ago 11:24 PM
IStream
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by Minnewaska View Post
I guess my point is that I would prefer a better answer to why I shouldn't expect corrosion on the bolts or chafing of the galvanization at mating surfaces, rather than simply be told I will be okay with a lifetime guarantee. Private or public company aside, I will take a product that doesn't present an unknown like this, before I dismiss it to a lifetime guarantee.
The bolts are stout as hell and can be inspected at the beginning of the season in all of 5 minutes. If any of them look suspect, they can be replaced for free under warranty or, if Mantus is no more or you don't want to wait, they can be bought for a few bucks at the local big box store. I don't think chafing is a practical problem. The different parts of the anchor don't move relative to each other, so no opportunity for chafe.

I've been happy with my purchase. It's not as pretty as a Rocna but it holds well, is a good value, and the company has been good to deal with so far. I don't like the quality of the galvanization on my roll bar but the rest of it is fine and I have no doubt that they'll make it right.
4 Weeks Ago 11:08 PM
smackdaddy
Re: Those new fangled Mantus Anchors..Bought One...Why

Quote:
Originally Posted by Minnewaska View Post
I guess my point is that I would prefer a better answer to why I shouldn't expect corrosion on the bolts or chafing of the galvanization at mating surfaces, rather than simply be told I will be okay with a lifetime guarantee. Private or public company aside, I will take a product that doesn't present an unknown like this, before I dismiss it to a lifetime guarantee.
Oh please. Like bent shanks, or inferior steel?

Dude, you're really stretching here. Why do you have such a thing for Mantus? It's a freakin' great anchor at a great price with great customer service.

'Nuff said.
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