Going from Standard to Metric Rigging? Advantage? - SailNet Community
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post #1 of 7 Old 08-20-2013 Thread Starter
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Going from Standard to Metric Rigging? Advantage?

OK so my next question concerning my rigging is would it be advantageous to convert to metric? Refitting a 34' Seafarer for coastal work first with some runs into blue water and I am replacing the rigging wire and going to swageless terminals on the lower ends at least, maybe the uppers as well, still investigating that. Seeing as how most areas outside the US are metric I'm wondering if it will be easier down the road to source out metric hardware/wire etc. By my estimates my rigging is 1/4" right now which equals about 6.4mm. If I move up to 7mm I will be gaining some more strength and in my mind simplifying the measurements and the like. I might have to open up some of the pin sizes on my existing turnbuckles and tangs but that's not a big deal. Any suggestions on this? Also, this boat is 40yrs old and has the original forged bronze turnbuckles, which are huge, should these be replaced as well, I'll have them inspected if they aren't a necessity?

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post #2 of 7 Old 08-20-2013
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Re: Going from Standard to Metric Rigging? Advantage?

If your going to replace the rigging and going offshore then do the swageless terminals on both ends. This way you will be able to replace the wire anywhere, anytime by yourself. I have been able to source 5/16 pretty much everywhere. Also, I carry enough spare wire for several rigging sections. Again, if the turnbuckles are 40 years old and your going offshore then it is prudent to replace them as well. How about your chain plates? Riggingonly.com has been a good source for rigging supplies.
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post #3 of 7 Old 08-22-2013
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Re: Going from Standard to Metric Rigging? Advantage?

If you're going abroad, I'd say there is an advantage to metric. We are one of the few hold-outs, worldwide. So, if you're in the med and pop a shroud, it might be easier to get 4mm than 3/16" wire rope and the pins would have the same story. My 25' trailierable will never see foreign waters so I'm just guessing.
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post #4 of 7 Old 08-22-2013
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Re: Going from Standard to Metric Rigging? Advantage?

+1 on swageless.

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post #5 of 7 Old 08-22-2013 Thread Starter
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Re: Going from Standard to Metric Rigging? Advantage?

All swageless will be the way I go, just considering all angles in order to not spend more than I have to. Pursuant to that goal I found these turnbuckles from Suncor, they are integrated toggle, tunrbuckle, and swagleless fitting:

Suncor 316 SS Quick Attach Stud and Toggle Turnbuckle

I know they are all stainless and may pose a galling risk but if maintained properly and anti seized as anything stainless must be then they seem like a good deal. Will do more research. Its a pity my rigging is so old, I tend to think that stuff from the era this boat was built was overbuilt and well made, but you can't take any chances with this stuff, too much riding on it. I'll consider consulting a proper rigger but for now I am pricing everything out in 5/16th because I think moving up from 1/4" given the boats possible blue water use is not a bad idea. Good advice from everyone
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post #6 of 7 Old 08-22-2013
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Re: Going from Standard to Metric Rigging? Advantage?

When I switched over to swageless I used Sta-Lok. I found that different vendors had different prices and not every vendor stocked every piece that I needed. I ended up buying from several sources to complete the project.

More importantly, when I was unsure about size and what pieces I needed, Defender gave me the toll free number of their supplier in Florida. At the time, this was the only supplier for all of them. I had a spreadsheet and notes from my own research. I started by asking just the steps I was unsure about but he took the time to walk me through from beginning to end and help me get exactly what I needed. I think we talked for about 45 minutes.

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post #7 of 7 Old 08-23-2013 Thread Starter
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Re: Going from Standard to Metric Rigging? Advantage?

I'm finding the same, when you multiply by 16 saving a few bucks on each part can add up. Obviously I see more of the standard vs metric rigging and carrying enough to make repair and replacement under way really negates sourcing stuff in other countries. This is an enjoyable section of the boat to consider; if offers peace of mind when you know your rigging. Any input on the turnbuckles/swageless combo in my last post? Thanks
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