any good do you think. swageless fittings

I would think copper collets far too soft , they will deform but fail to provide enough pull out resistance IMHO.

I looked at the angle of the internal collet (very small) , in theory this will mean for a given force on the end of the collet from the nut a very high clamping force will be exerted on the wire in the centre of the collet.
One problem with this is the condition of the two sliding surfaces , if they gall or bind the force will be a lot lower.
I would expect the instructions might mention using a lubricant or anti corrosion grease , this would improve the assembly and prevent possible crevice corrosion in service?

I'm slightly of the opnion that bending over individual strands weakens them , although I know Norseman etc. have a very good reputation.
 
jakeroyd said:
I would think copper collets far too soft , they will deform but fail to provide enough pull out resistance IMHO.

I looked at the angle of the internal collet (very small) , in theory this will mean for a given force on the end of the collet from the nut a very high clamping force will be exerted on the wire in the centre of the collet.
One problem with this is the condition of the two sliding surfaces , if they gall or bind the force will be a lot lower.
I would expect the instructions might mention using a lubricant or anti corrosion grease , this would improve the assembly and prevent possible crevice corrosion in service?

I'm slightly of the opnion that bending over individual strands weakens them , although I know Norseman etc. have a very good reputation.
Click to expand...

I think your completely wrong.Copper is used for the normal external crimp & it is not held under the constant pressure this internal collet system provides.
 
The question of the material the insert is made of drew my attention.

I bought some cheap stainless steel swagelesss fittings a couple of years ago to make a temporary fitting for the boat. Although the body was certainly SS, the insert wasn't, and within weeks of being installed, quite bad rusty streaks appeared from within the fttings. Don't know what the insert was made of (mild steel?) but I'd never trust them for serious rigging. Before chucking the lot, I tried to undo one of the fittings and it was seized pretty solid, so I didn't expend much time trying I'm afraid. Don't know if that was a god or bad thing?

I'd certainly want to know the specific grade of SS and the material used for the cone before using for boat rigging. There's a lot of cheapish stuff being sold for domestic balustrades etc at the moment... ...Chinese origtn? Wrote to the supplier but he didn't know details of construction either!!!!

Whatever, if it's cheap, there's probably a reason.
 
weustace said:
The fitting instructions (http://www.gsproducts.co.uk/blog/how-to-fit-swageless-compression-steel-wire-rope-terminal-fittings/) suggest that the cone is indeed 316 SS, which would seem sensible. I assume the fittings are reusable, but if not it begins to compare unfavourably to swaged equivalents—they don't seem to sell replacement cones, but perhaps this is not necessary with this design?
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It isn't the reusable feature that is normally interesting, but doing it oneself without finding someone with a roll swaging machine. I happily swage Talurit type ends with a DIY hydraulic press, but a roll swager is serious money.
 
I have used those fittings 6 years ago to couple the inner forstay to the chain plate. Still there and no issues. Easy to fit.
 
The price I compared it to was from S3i and included cutting to length and swaging, but I can appreciate that if you wanted to make up rigging on site or at very short notice (or wanted emergency rigging gear) you wouldn't be able to swage them on. What is the maximum diameter of wire you can splice do with your press?
 
weustace said:
The price I compared it to was from S3i and included cutting to length and swaging, but I can appreciate that if you wanted to make up rigging on site or at very short notice (or wanted emergency rigging gear) you wouldn't be able to swage them on. What is the maximum diameter of wire you can splice do with your press?
Click to expand...
5mm if it is my press you are asking about.
DW

Edit: A 20t bottle jack in a frame made up from bits of steel from the off cut bin. Cost £40 for the jack. Swages made up from 16mm squ bar.
 
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are these fittings primarily for decorative architectural applications? I can't see how a compression fitting like this will have a break point proportionate to the wire diameter and they don't give any figures. The Stalok fittings are belt and braces in comparison with the cone compressing the wire and it being trapped against the cone.
 
As ParaHandy says, the reliability of Sta-Lok must be superior as the cone grips that inner core and the outer bit holds the outer strands. These (and roll swaging) grip only on the outer strands. Four of these will cost you over £60 for 6mm size. For four Stay-locks you will pay about £110 from Jimmy Green. I would happily pay the extra for use on my boat. A mast coming down can be a bit traumatic. And expensive.
 
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