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Author Topic: Unidentified Marine Object  (Read 1595 times)

BarryM

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Unidentified Marine Object
« on: October 12, 2012, 08:50:53 AM »

It's yellow, about six inches long, pivots in the middle and is being used to secure a mooring wire. Is it marine, agricultural or what? It's identity is even baffling Bryan Young and as he sailed with Noah, it must be unusual.  :P

Barry M
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derekwarner

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Re: Unidentified Marine Object
« Reply #1 on: October 12, 2012, 09:13:42 AM »

Goodness..... {-) in OZ we use them 5 days out of 7  %%

They are called a "Double D Center Swivel Engagement Link Load Shackle" ....the only thing outstanding is nominating the mechanical load rating by kg's ..... :P ....Derek
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Derek Warner

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Illawarra Live Steamers Co-op
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BarryM

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Re: Unidentified Marine Object
« Reply #2 on: October 12, 2012, 09:40:43 AM »

Derek,

I've tried searching on that description and turned up every kind of shackle imaginable - but not that one! If it's Kiwi kit should I have checked with a museum?  %)  %)

Regards

Barry M
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John W E

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wbeedie

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Re: Unidentified Marine Object
« Reply #4 on: October 12, 2012, 11:21:17 AM »

its a hammerlock split link , use it to join looped end of wire together in trawls , you hammer out the centre pin which goes through the holes on the two main parts and a centre piece , to disconnect it and opposite to assemble , a great piece of kit
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derekwarner

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Re: Unidentified Marine Object
« Reply #5 on: October 12, 2012, 11:39:13 AM »

Interestingly.....all of these load lifting....load restraining type products marketed in OZ are produced in Europe

Most are offered by Bullivants or the Blackwoods type people

Sorry.... I too cannot locate .... "Double D Center Swivel Engagement Link Load Shackle" in the Bullivants electronic catalogue ...but can find the double D hammerlock split link ...which  >>:-( is the same item  >:-o

So thanks bluebird for the clarification........:embarrassed: ....Derek
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Derek Warner

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Illawarra Live Steamers Co-op
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www.ils.org.au

wbeedie

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Re: Unidentified Marine Object
« Reply #6 on: October 12, 2012, 03:28:32 PM »

Hammerlock a lot easier to say DDW , we use these at the fishing , just got to check the centre pin is still good and the parts around the holes dont get worn away to much by the seabed ,I never looked at Bluebirds link as I knew what it was but that did give the best info
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BarryM

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Re: Unidentified Marine Object
« Reply #7 on: October 12, 2012, 04:44:40 PM »

Thanks for all the replies. Just goes to show that what is a mystery in one corner of the marine world is commonplace in another. I assume the pin is an interference fit as there is no sign of any form of locking device and thus the name?

Regards,

Barry M
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nick_75au

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Re: Unidentified Marine Object
« Reply #8 on: October 17, 2012, 09:56:47 AM »

If memory serves me correctly the central piece (Thicker looking part of the pin in the middle) holds the pin in place, It has a friction hold on the pin, greased many of them as part of my duties as an MT in the minesweeping group. The grease was known as creepers or creeping grease, again I cant recall the proper name(it was an anti seize ) but it was a semi liquid with metallic looking flakes in it. It got everywhere hence the creeping grease  %) %)

Nick
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BarryM

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Re: Unidentified Marine Object
« Reply #9 on: October 17, 2012, 06:34:11 PM »

"Black Oil and Graphite" was used for anti-sieze before the molydenum sulphite based high temp anti-sieze compounds were introduced. Could this be what you're describing?

Barry M
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nick_75au

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Re: Unidentified Marine Object
« Reply #10 on: October 18, 2012, 06:33:18 AM »

 Thinking about it some more it may have been a locktite product, it was a lead grey colour and had distinctive shiny flecks in it.

Nick
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