That looks like a non cloggingf righting swivel, specifically made for the Rocna anchors.
The reason that one is so poplar with Rocna owners is that since the Rocna wont set or hold, when you drag it around the anchorage it won't clog up.
Rolls
Out
Continuously
New
Anchor
Isn't ROCNA just a misspelled and backward spelled ANCHOR?
Manyboats: My Willard 40 carries a 55kg Rocna and I'm frustrated by the way it will often turn "backwards", making it difficult to haul over the bow roller. I found a ready made "righting swivel" called the Twist sold by Italian Osculati Marine but not sold in the US or Canada. I may have to have one made custom. Any leads to a retailer will be appreciated.
Yes, upside down. Just like when your anchor turns turtle.
I have found that a chain groove in the bow roller does a much better job of orienting the anchor on retrieval that a swivel, and since you can use regular shackles, it is far less prone to failure. And I'll bet you could get a groove machined in your roller for the same cost or less than you would pay for a swivel.
The grove ensures that the chain pays out and retrieves without twisting. When properly shackled, and your anchor comes up, gravity causes it to always rotate to the right orientation. Ours comes up correctly 100% of the time.
I found a swivel to actually be as much a part of the problem with anchors coming up the wrong way as they were a solution for correcting alignment. Because they swivel, they allow the anchor to lose it's orientation, so it then comes up backwards or sideways. And I when it did come up wrong, I didn't find it any easy feat to get it straightened out. After a few uses the swivel tends to bind up with sand and mud making swiveling difficult. And when you try to rotate the anchor, the chain just wants to twist rather than the swivel swiveling. So I kinda thought they sucked.
I don't have a chain rode so I can't check it out but w a bow roller that has a groove how can the chain not go down and up orientated the same way? Of course things happen but usually things don't happen. I suspect the chain should come up very dependably oriented the same way all the time w the groove in the roller.
All I can say is that many times I have seen advice not to use an anchor swivel. Apparently it's the weak link in the system and a likely point of failure.
Never have that problem with my inexpensive-and very-effective Bruce-knockoff Lewmar Claw. Sure glad I didn't waste all that money on an upside-down Sarca or Rocna!!
That looks like a non cogging self righting swivel, specifically made for the Rocna anchors.
The reason that one is so poplar with Rocna owners is that since the Rocna wont set or hold, when you drag it around the anchorage it won't clog up.
Rolls
Out
Continuously
New
Anchor
I don't have a chain rode so I can't check it out but w a bow roller that has a groove how can the chain not go down and up orientated the same way? Of course things happen but usually things don't happen. I suspect the chain should come up very dependably oriented the same way all the time w the groove in the roller. Tom good input - thanks.
So that seems to make this twist thing not needed.
I've read lots of that. When you can find first-hand reports (as opposed to Internet repeats) with accompanying factoids... many of the examples turn out to be with swivels that were invented before sliced bread, made out of crap, too small, or installed incorrectly.