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 Post subject: Problem with fin screws
PostPosted: Wed Oct 10, 2012 7:52 am 
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Joined: Tue Dec 29, 2009 12:15 pm
Posts: 53
Location: Malta
Have some problems with getting 1 screw out from my surfboard. It has no grip anymore, its just rounded hole ... so no screwdriver in my tool box can get a grip .... any tips on how to pull that screw out?


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 8:53 am 
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Joined: Fri Sep 09, 2011 7:13 am
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Location: Kitebeach, Cape Town
I have drilled a problem screw like this out before. Start with the smallest drill bit and slowly go bigger. Try and judge the angle right by measuring the angle with the other hole.

I've tried to steel epoxy an old screw key to the bad screw but never came right with this trick.

Best advice is replace the grub screw at the first signs of any wear on the head to avoid this problem later down the line.


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 9:34 am 
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Try an Impact screw driver.


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 12:00 pm 
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Lanc wrote:
Best advice is replace the grub screw at the first signs of any wear on the head to avoid this problem later down the line.



Yeah that was the case, successfully replaced 5 8) .... but 1 is a trouble maker :angryfire:


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 1:05 pm 
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Location: Denmark
If the screw is not countersunk, you can simply saw a new notch in the head.
Very easy !

Assume it is for footstraps and not fins, as noone (except for Slingshot) uses screws for surfboard fins.

If you got a footstrap where you can NOT saw a notch for some reason, then you have another alternative:

If you have access to one at a workshop, you can use or borrow a "screw extractor".

This is a narrow diameter screw tap with left handed thread, so you drill a hole in your screw, and can turn the screw out by means of this left handed screw tap, by simply cutting a new thread counterclockwise in your drilled hole.


Otherwise - if you have some kind of "Dremel" tools or similar - you can try to make a small slot/notch in the head, without wrecking the board (not easy though...) - but might not be possible as the stainless screw is extremely hard.


Finally, if it is a mini-tuttle box fin, you can drill the head "away" and ditch the fin and use a new one instead.

Just a couple of solutions :thumb:

:D Peter


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 6:18 pm 
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Location: Malta
its one of the grub screws in the fins ...


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 6:25 pm 
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Joined: Mon Nov 28, 2005 11:44 pm
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Location: Great Falls, Montana, USA
A small drill bit and a screw extractor is a fairly cheap method that can prevent damage to the surrounding equipment. I've used 'em without the fancy holder before - just a pair of locking pliars... Use the size of drill bit specified on the package. The key for me was to tap it in with a hammer before turning.

http://en.wikipedia.org/wiki/Screw_extractor


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 6:26 pm 
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What Peter said. :wink:


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 Post subject: Re: Problem with fin screws
PostPosted: Wed Oct 10, 2012 9:59 pm 
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kitezup wrote:
its one of the grub screws in the fins ...


Aaah, sorry, I did not get the "topic headline" which said it was the fin screws loud and clear - my mistake...

So it is the small "Allen key" fin screws.

Still, a small screw extractor might do it.

To prevent the hex from damage, one has to be careful, as there are two almost identical screws, but the Allen keys dont match :cry:

One is the most used Future and FCS grub screws which are typical US/Imperial, whereas Naish uses a Metric size for their FCS/DFS fins.

So one is 2.38mm (3/32"), the other is 2.5mm.

And they dont fit into each other - and such a small difference that you can almost not measure it :(

We have often bothered A LOT with this, when on wave trips together, and "borrowing" Allen keys from each other :x

I've also seen some "cheap" fin keys, that are not 3/32 nor 2.5 and looks like something not belonging to any standard :(
They also tend to be damaged really easy - too soft and not hardened material, so they get messed up fast :wink:

:D Peter


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