Forum for kitesurfers
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davesails7
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Postby davesails7 » Sat Aug 11, 2012 1:08 am
Just got a new set of fins, but I can't get the old ones out of the board! They've been in there for about a year.
What's the best way to get a stuck fin out?
It's a Cabrinha 183 with powerboxes.
Thanks!
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borist
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Postby borist » Sat Aug 11, 2012 1:33 am
did you try to loosen up screws couple of turns and then tap the top of the screwdriver with a hammer (gently)? I used to do this often when windsurfing. Usually worked, but you have to be careful so the screwdriver does not slip from the screw. Or put a long screw in and tap that. Fins typically have M6 thread, but there are some with 1/4-20UNC
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ronnie
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Postby ronnie » Sat Aug 11, 2012 3:37 pm
An advantage with Powerbox fin bases is that they were designed with the idea of the fin hitting something and coming out of the box, so on my windsurf boards I tap the powerbox fins near the top of the leading edge. If necessary use a mallet.
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davesails7
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Postby davesails7 » Sat Aug 11, 2012 7:59 pm
borist wrote:did you try to loosen up screws couple of turns and then tap the top of the screwdriver with a hammer (gently)? I used to do this often when windsurfing.
That worked great, Thanks!
Some sand had gotten in there so it was really jammed.
The new fins are a little loose in the box, looks like they had some tape on them at one point. What kind of tape is best for getting a snug fit?
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borist
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Postby borist » Mon Aug 13, 2012 4:49 pm
We usually use "foil tape" like
this one. Go to home depot or similar store and look at some of them, should be in A/C/heating area. Tapes are strip of aluminum foil with adhesive on one side. Some have thick adhesive layer, do not get those, find one that is very thin.
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davesails7
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Postby davesails7 » Mon Aug 13, 2012 5:16 pm
borist wrote:We usually use "foil tape" like
this one. Go to home depot or similar store and look at some of them, should be in A/C/heating area. Tapes are strip of aluminum foil with adhesive on one side. Some have thick adhesive layer, do not get those, find one that is very thin.
Cool thanks. Once I got the fins screwed in all the way, it didn't seem loose at all. Maybe no tape needed, will have to try it out and see I guess. Just need some wind now!
I also did some searching on the forum and found an old post about the original Sectors where Peter Frank says to try Gaffa tape, which is like duct tape, but the adhesive comes off cleanly.
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davesails7
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Postby davesails7 » Fri Sep 14, 2012 6:16 pm
So when I was putting my new fins in I think I semi stripped one of them. So I bought a new one of these:
http://www.windance.com/Barrel-Nut-6mmx9mm-Std.html
What's the best way to hammer out the old barrel nut and put the new one in? How do you keep the new one straight when putting it in?
Is it ok to hang the fin over the edg of a table and tap the nut out of the fin? Seems bad for the fin.
Is there somewhere I can buy about 100 of these in a box for like $10? Because I think I might have messed up another one now from sand getting jammed in between the nut and bolt.
Each of my old Cabrinha fins has one of these nuts also (although they are standard, not metric). They look like they are glued in on the Cabrinha fins, anyone know if that is the case? I don't want to start hammering on them if they are glued in.
Sorry for all the questions!
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Nico
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Postby Nico » Mon Sep 17, 2012 4:30 am
ou want to support the fin box as close as possible around the insert, so forget the table edge/fin idea. A slightly bigger washer ona firm table or bench and a good driving punch will remove the insert (glued or not). They are usually only press fitted and not glued.
Nico
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