This fin has a hairline crack above the barrel nut on both sides. I haven't hit anything with it, but I am probably guilty of over tightening.
Sail with it? Repairable? Give it the Burton?
Crack is most likely due to corrosion of the barrel nut swelling and then cracking it. Well, maybe with the force of tightening acting in that direction, which is not helping.
First thing is to knock the nut out to relieve that constant pressure.
Then as an idea which may or may not work....
Open up crack and allow epoxy to seep in, then let it close again. Wipe of excess.
That has glued it up and putting in a new nut (after it has dried) may be enough.
But to be safe I would then grind out along the crack say 3mm wide and 1mm deep and fill with fibres (glass, carbon whatever) and epoxy, then sand back. That has then increased the width of the surfaces bonded together.
Other way.
Whack out nut.
Fill hole with wax
Grind / cut out a vee (from top of pic - where the screw comes down into fin)
Fill that big vee with fibres and a good epoxy like JB Weld
Redrill hole from top
Remove wax and insert new barrel nut
All well and good MA.
The crack is best dealt with by buying six more new fins of different sizes.
You know you want to.
Select to expand quoteIssa said..
All well and good MA.
The crack is best dealt by buying six more new fins of different sizes.
You know you want to.
Hey he is welcome to buy 6 new ones
just post me the "useless" one 
(I would also tell the missus the fin is buggered and I need new ones though...)
Brilliant idea.
You could then send the cracked fin to me, so I can get more fins.
The possibility is limitless. One cracked fin has potential to sustain an industry.
Select to expand quoteIssa said..
Brilliant idea.
You could then send the cracked fin to me, so I can get more fins.
The possibility is limitless. One cracked fin has potential to sustain an industry.
I will swap it for a handful of corroded barrel nuts. To help you out ya know....
Update. This is how I did the repair. After cutting in a "V" and gluing, I dremelled in a 1mm x 5mm groove across the crack and filled it with epoxy and glass strands:
Sanded, another coat of resin, and sanded again - stronger than new I think.
Select to expand quotePeterHazael said..
What about the barrel nut, I cant find them at any of the local nut shops?
you can order online from windsurfing suppliers
