fabricating a spinnaker pole.. - Page 2 - SailNet Community
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post #11 of 22 Old 01-10-2008 Thread Starter
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That's pretty wild CapnHand...

Hey BobMcGov, do you have any sources for the aluminum? Any specific alloy for the tubing?
gh
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post #12 of 22 Old 01-10-2008
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Hey BobMcGov, do you have any sources for the aluminum? Any specific alloy for the tubing?
Mauri Pro has it in 9' lengths for $132 plus shipping. Looks like a basic aluminum 6063-T alloy. Can't find the right length on MSC direct, but I'm sure you can find a marine-grade 6061 or 6063 wholesaler on the web. Pole ends can be had for $70; add a couple pad eyes in the middle & yer ready to sail.

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SJ21, Diarmuid
Albin Ballad 30, Fionn
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post #13 of 22 Old 01-10-2008
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.... Pole ends can be had for $70; add a couple pad eyes in the middle & yer ready to sail.
GH -

Strongly suggest that you use a bridle for the downhaul attachment at least... a single mid pole padeye will permit far too high a bending moment if things go wrong and your brand new pole could severely bend or even snap.

You can usually get away (on a smallish boat) with a single point pole lift as there is seldom more load on it than the pole weight itself. But the loads on a downhaul can be significant, even on a smaller boat, in a breeze.

Ron

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post #14 of 22 Old 01-11-2008 Thread Starter
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Thanks Faster. Was wondering why I have seen pics of poles with pad-eyes and others with bridles.
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post #15 of 22 Old 03-11-2009
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I am fabricating a new spinnaker pole. I bought aluminium pipe 60mm OD with 2 mm thickness. My J dimension is 12 feet. In order to be able to carry it easly I split it two parts. Then I bought stainless steel pipe having 60 mm inside diameter. I used some part of this pipe as demontable connecting piece in the middle. I fabricated two caps from the stainless steel pipe parts and closed their ends with stainles steel plates by welding. I also welded two stainless steel shackles to the two ends. All costs around 50 USD. So I have now a spinnaker pole which can be dissambled into two pieces. Since your J is 10 feet you can use 10 inch diameter aluminium pipe.
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post #16 of 22 Old 03-11-2009
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I am fabricating a new spinnaker pole. I bought aluminium pipe 60mm OD with 2 mm thickness. My J dimension is 12 feet. In order to be able to carry it easly I split it two parts. Then I bought stainless steel pipe having 60 mm inside diameter. I used some part of this pipe as demontable connecting piece in the middle. I fabricated two caps from the stainless steel pipe parts and closed their ends with stainles steel plates by welding. I also welded two stainless steel shackles to the two ends. All costs around 50 USD. So I have now a spinnaker pole which can be dissambled into two pieces. Since your J is 10 feet you can use 10 inch diameter aluminium pipe.
That's interesting...and very creative. But I gotta ask, why bother? Spinnaker poles fit very nicely on the foredeck, ready to use, or if you really want a clear deck, onto the front of the mast. Having a pair of long poles needing storage somewhere downbelow, then have to assemble and disassemble sound slike a real PITA, what makes this a solution rather than a problem?

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post #17 of 22 Old 03-11-2009
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....Since your J is 10 feet you can use 10 inch diameter aluminium pipe.
That's one fat spinnaker pole

I'm curious, too, why you feel two 6 foot poles stowed is better than one, but I'm not familiar with your boat... and this must have ended up a bit on the heavy side, comparatively speaking.

Ron

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post #18 of 22 Old 03-11-2009
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I was looking at spin poles yesterday at a local supply house, They had 1.5-4" diam poles of various lengths in stock for $150-1100 for some of the 1.5" alum to the 4" carbon poles. Ends for $60-200, again, depends upon the diam of the pole for end cost.

Their made to buy a length of pole too long, cut off appropriate amount to get the correct J measurement for your boat.......Can not really see why one would try to reinvent the wheel. Not sure the savings is worth it.

For a 12' pole, an alum with ends about $500, double that or a bit less IIRC for a really light carbon pole. With out weighing would swag the carbon is 1/4 the wt of alum. At least from the lifting two appropriate 2.5" poles for my boat there was a significant difference!

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post #19 of 22 Old 03-11-2009
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obarut-
"All costs around 50 USD. " You couldn't buy the metal from a scrap metal dealer in the US at that price, much less buy twelve feet of any kind of pipe stronger than plumbing pipe.
60mm OD is about a 2-1/2" pipe in US terms, 2mm wall thickness would be about 3/16" thickness...but once you scale up to larger poles and the alloy becomes important as well, the prices here skyrocket.
Pipe isn't cheap, even for plumbing, here. Of course the premade poles usually come with particular shackles. Are you using the same kind, or simply "good enough" to do?
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post #20 of 22 Old 03-12-2009
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First of all cost has prime importance for me. A ready pole having length 12 feet costs 1000$ here in Turkey and I do not want to spend that much.
Second I am not a racer and so that I have plenty of time to rig the pole when needed.
Third I am not living at the seaside so that I made the pole in two parts otherwise it is not possible to carry it to the boat which is in another city 700 km where I am living. Each part is 6 feet long so it is not a big deal to store it anywhere in or my boat. You need to unscrew only 4 of 4mm screws.
My boat 31 feet Jeanneau. For bigger boats longer poles are needed which means an increase in weight. İn that case special alloy pipes must be used.
I am using ordinary snap shackels.
I do not think that aluminium pipes and shackels are more expensive in US. because as far as I know the cheapest metal prices in the world are in USA.
Of course it is also possible to use ready made pole ends. But they are also expensive, 130$ each. Bu the ends that I fabricated cost 10$ each.
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