Talurit Terminals

[Ceirwan]

Hi,
The old rigging which i am due to replace on my yacht has Talurit ends on the wires, does anyone have a list of the amount this reduces the strength of 1x19 stainless wire by?

(The sizes in question are 4mm and 5mm)
Thanks
Rich

 

[Bilgediver]

There is no reason for properly applied talurits to weaken the wire...if you pull test talurits the wire usually fails at other places than the ends!!!

 

[Ceirwan]

Thanks!
Can anyone tell me then why more expensive swaged terminals are used these days? (Other then to cost us more money!)

 

[sarabande]

Talurit themselves take a very precautionary approach to their product, with plenty of clear, operational warnings.

http://www.talurit.com/webbplats/products/warnings_english_762.asp

The US navy in an excellent little document ( U.S. Navy Technical Manual for Wire and Fiber Rope) of 126 pages (bedtime reading for all !) says that a swage sleeve shall be tested to 40% of the wire rope acceptance breaking strain, and held for 10 minutes.

I take it that this is their safe working practice load for swaged fitting, so where Mainco give a minimum breaking load of 2.31 tonnes for their 5 mm 1x19 ss wire, and 1.47 tonnes for 4mm wire, it could be suggested that a swage fitting (e.g., but not specifically, Talurit) reduces the safe working load to 0.92 tonnes and 0.58 tonnes respectively. That's not very much but as an empirical guide, it's what the books say.

 

[DownWest]

The use of terminals(looks apart), as oposed to Talurit, is mostly because 1x19 doesn´t like going round corners in the larger sizes. Less of a prob. in your case with 4&5 mm. I use 7x19 flexible for small boat shrouds. Bit nicer if you trail/sail and rig the mast each time. It is about 8% weaker than 1x19 but in small boats that is not too important as 4mm will lift over a ton.
Andrew

 

[oldharry]

[ QUOTE ]

Can anyone tell me then why more expensive swaged terminals are used these days? (Other then to cost us more money!)

[/ QUOTE ]

1. Talurit, although still well above the BS of the wire itself is the weakest form of terminal, rolled swages are stronger

2. Talurit swages are difficult to make properly in anything over 6mm stainless wires, or 8mmm in flexible stainless.

3. Rolled swages look better. (Some say /forums/images/graemlins/smile.gif )

4. Rigging screws can have a wire swaged directly on to the top screw, thus avoiding a joint (potential weak point) in the rig.