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04-19-2016, 07:56 PM
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#1
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Senior Member
City: Gig Harbor WA
Vessel Name: Salty
Vessel Model: American Tug 34
Join Date: Oct 2008
Posts: 381
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Righting swivel for Rocna anchor
Can anyone tell me where I can locate a vendor for a so-called "righting swivel"? It looks like this:
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04-19-2016, 08:08 PM
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#2
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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That's clever. It's obvious how it works. Many here could be interested in this.
Question though is why is it aimed at the Rocna?
__________________
Eric
North Western Washington State USA
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04-19-2016, 08:26 PM
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#3
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TF Site Team
City: Ex-Brisbane, (Australia), now Bribie Island, Qld
Vessel Name: Now boatless - sold 6/2018
Vessel Model: Had a Clipper (CHB) 34
Join Date: Jun 2008
Posts: 10,101
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You're right Eric. That could well be the perfect answer to the fact many anchors occasionally insist on coming up orse-about...and no loss of strength, (as long as that swivel join is robust enough), or anything to catch on the bowsprit either. Even Marin would be hard-pressed to find fault...
Actually, it occurs to me, that really, with that curved shape making it virtually certain, if one paused a sec at that point of the curve, that the anchor would come up the right way anyway, that a swivel at the chain end is virtually superfluous, wouldn't you think..?
__________________
Pete
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04-19-2016, 08:38 PM
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#4
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Veteran Member
City: Tarpon Springs
Vessel Name: Conchy Jac
Vessel Model: Rosborough RF 246
Join Date: Feb 2016
Posts: 36
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might be my ignorance talking but does that replace he Manson Supreme rock slot? I have the Manson and love it. Never had a problem with it coming up bass ackwards or orse about but I'm sure that will happen to me down the rode. How much does it swivel? I'm interested to learn a little, not trying to be too funny.
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04-19-2016, 08:39 PM
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#5
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Guru
City: Sidney BC Canada
Vessel Name: RochePoint
Vessel Model: 1985 Cheer Men PT38 Sedan
Join Date: Apr 2009
Posts: 1,744
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You can get something similar from Anchor Right called a flip link.
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04-19-2016, 08:49 PM
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#6
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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Haha Peter ....
Looks like your guys are already on top of it.
No need for the bling either.
Not superfluous at all. When it comes up 180 out the bent bar needs to rotate .... no I think I see your point Peter. The bent bar will just rotate the chain between the bow roller and the gypsy. On some boats that distance could be short and the swivel may be needed.
Rossigal,
Can't see that it has anything to do w the rock slot.
__________________
Eric
North Western Washington State USA
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04-19-2016, 08:50 PM
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#7
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Veteran Member
City: Tarpon Springs
Vessel Name: Conchy Jac
Vessel Model: Rosborough RF 246
Join Date: Feb 2016
Posts: 36
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Thanks Mike, think you just answered the question.
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04-19-2016, 08:53 PM
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#8
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TF Site Team
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
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I'd be careful about getting the wrong model. As all salty dogs know, anchors from the southern hemisphere (SH) tend to favor the CCW (anti-clockwise for you non-Yanks) rotation when retrieved. Obviously, northern hemisphere (NH) anchors rotate the opposite direction. The SH model compensates for this CCW bias and works great on SH boats. If you mistakenly install the SH model on a NH boat, the anchor swivel may be grossly aggravated.
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04-19-2016, 09:15 PM
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#9
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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04-19-2016, 09:29 PM
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#10
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Senior Member
City: Gaine's Marina
Vessel Name: REAL MOUNTIE
Vessel Model: 1986 PILGRIM 40 HULL No 28
Join Date: Jun 2012
Posts: 179
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Swivels
Swivels are a popular accessory helpful in reducing rode twist and allowing
the anchor to be rotated upon retrieval. A swivel should be rated to the
breaking strength of the chain (not the working load), and care must be
taken to avoid cheap, poorly engineered, and badly built designs.
When installing, be sure the swivel cannot be subjected to a veering
load and can rotate properly. We do not recommend attaching the fork
of a swivel directly to the anchor shank. It is safer to put a few links of
chain between the swivel and the anchor. If this is done, an articulating
“ball-and-joint” design is pointless, and an in-line rotating design will be of
simpler construction and probably a better solution.
For more information, please consult the article on swivels on the Rocna
Knowledge Base.
Source: http://www.rocna.com/sites/default/f...s-guide_en.pdf
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04-19-2016, 09:48 PM
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#11
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Moderator Emeritus
City: SEWARD ALASKA
Vessel Name: DOS PECES
Vessel Model: BAYLINER 4788
Join Date: Feb 2011
Posts: 6,266
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04-19-2016, 10:52 PM
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#12
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TF Site Team
City: Ex-Brisbane, (Australia), now Bribie Island, Qld
Vessel Name: Now boatless - sold 6/2018
Vessel Model: Had a Clipper (CHB) 34
Join Date: Jun 2008
Posts: 10,101
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Kevin, that was positively naughty...
__________________
Pete
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04-19-2016, 11:26 PM
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#13
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Guru
City: Vermont
Join Date: Jan 2013
Posts: 10,092
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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.
__________________
MVTanglewood.com
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04-19-2016, 11:36 PM
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#14
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TF Site Team
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
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Quote:
Originally Posted by ksanders
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Isn't ROCNA just a misspelled and backward spelled ANCHOR?
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04-20-2016, 12:09 AM
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#15
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Senior Member
City: Gig Harbor WA
Vessel Name: Salty
Vessel Model: American Tug 34
Join Date: Oct 2008
Posts: 381
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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.
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04-20-2016, 12:28 AM
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#17
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Moderator Emeritus
City: SEWARD ALASKA
Vessel Name: DOS PECES
Vessel Model: BAYLINER 4788
Join Date: Feb 2011
Posts: 6,266
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Quote:
Originally Posted by FlyWright
Isn't ROCNA just a misspelled and backward spelled ANCHOR?
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Yes, upside down. Just like when your anchor turns turtle.
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04-20-2016, 04:34 AM
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#18
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TF Site Team
City: Ex-Brisbane, (Australia), now Bribie Island, Qld
Vessel Name: Now boatless - sold 6/2018
Vessel Model: Had a Clipper (CHB) 34
Join Date: Jun 2008
Posts: 10,101
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Quote:
Originally Posted by nwboater
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.
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Did you not see Capt. Bill's posted link..?
Ocean Blue Twist Swivel Anchor Chain Connector Stainless Steel - Default
__________________
Pete
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04-20-2016, 07:53 AM
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#19
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Guru
City: North Carolina for now
Join Date: Aug 2011
Posts: 6,348
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Or go deluxe. These things work great, as they should for the price!
ULTRA Flip Swivel – Ultra Marine West / Quickline
__________________
George
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
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04-20-2016, 09:59 AM
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#20
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TF Site Team
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
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Quote:
Originally Posted by ksanders
Yes, upside down. Just like when your anchor turns turtle.
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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!!
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