How To Install A Longboard Center Fin Box

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sharkcountry's picture
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Re: [stingray] How To Install A Longboard Center Fin Box

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stingray wrote:

I had this idea......

...start some threads about basic stuff...put up some photos....interact with people...help some newbies...

maybe I could learn a thing or two.......or make some new contacts.....

I think it's working...gotta come up with a new topic.....Maybe a whole series of "how to" threads........

Ray

That's a great idea. I hope the "experts" don't rag on the people trying to help. I could do one on how to sand through a glass job. I'm getting pretty good at that.

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Re: [sharkcountry] How To Install A Longboard Center Fin Box

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     Howzit sharkcountry, Igot a laugh out of that and we all have sanded through sometime in our day but it just teachesus what not to do. I think a how to thread would be great and would probably cover a lot of topics and I would not laugh but would like to help when I can since that is what we are here for anyways. Aloha,Kokua

Aloha, Kokua

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Re: [stingray] How To Install A Longboard Center Fin Box

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FYI, there is a whole bunch of basic stuff in archieves.  Kokua wrote some of it and some other old dogs.  How to lay up a fin, how to do gloss.  Bunch of stuff.  Keith M put them together as summaries from Sways articles taken from yr 2003.  Here is one:

http://www.swaylocks.com/resources/detail_page2.cgi?ID=440

Journalism is Dead

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Re: [stingray] How To Install A Longboard Center Fin Box

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Hi stingray,


A few months ago I managed to install a centre fin box on my board to turn it into a widowmaker. Thanks for your thread which helped kick start the project and kept me on track during the process. A few little mistakes here and there but it's in, solid and lots of fun to ride.


 


 


 

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Re: [stingray] How To Install A Longboard Center Fin Box

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Hi all,

My First board and was wondering about the drilling the hole for the leash.  If you go right through the board does this hole let in water defeat the purpose of lamintaing and hot coating the board.  I have bought a leash plug, would i be better to install that. Dimensions are 8ft9  - 22- 3.

Just off to make my fin jig

Cheers in advance.  

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Re: [smalltownmotion] How To Install A Longboard Center Fin ...

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smalltownmotion wrote:


Hi all,


 


My First board and was wondering about the drilling the hole for the leash.  If you go right through the board does this hole let in water defeat the purpose of lamintaing and hot coating the board.  I have bought a leash plug, would i be better to install that. Dimensions are 8ft9  - 22- 3.


 


Just off to make my fin jig


Cheers in advance.  



Nothing wrong with a leash plug. Simple and strong.


After you router out the surfboard for the longboard fin box.....before you mix up any resin...drop the box into the slot to make sure it fits...you might have to do some sanding with a little sanding block to true up the sides...while the fin box is sitting there with no resin...measure from the tail to about 1/4" inside the box. Write that number down.....Now flip the board over...now you are working on the deck. Measure from the tail and mark the number that you wrote down.....drill a super tiny hole right in the middle of the stringer....got it ...now make a 1/2 inch hole from the deck down with a forstner bit or whatever you have.....put a piece of tape on the deck...flip the board over...when you install the fin box you will fill up this hole with resin....and then come back later and drill a 1/4 inch hole all the way through the deck and fin box...bingo!

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Re: [stingray] How To Install A Longboard Center Fin ...

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Since this thread was ressurected and I was going to ask anyway, what is the correct way to set the box at the right depth? I route the hole for the box and set the box with the tabs resting on the glass. When I sand the box I can't sand it smooth, the slot sits deeper than the glass and only the lip around it is sanded away at the center (ends are fine). Should I route the hole shallow so the box sits on the foam/stringer at center and the center of the box is high enough? But then what's the point of the tabs on the sides?

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Re: [haavard] How To Install A Longboard Center Fin ...

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I'm in San Diego County, California. The FU boxes have the tabs...I think that's Fins Unlimited...known localy as Bane Boxes....The tabs are nice for lining up the box.....But I prefer the High Surf boxes from Fibre Glas Fin Co...no tabs...


My install method works with both systems...I've had the same problem as Harvard.....some extra sanding...I use FU and HiSurf all the time......I'm not taking sides.


at one point in time ProBox Larry was selling Red, Blue, White and Black longboard boxes...He no longer sells the Red or Blue....If you have a Red or Blue Longboard box I want it...................Stingray

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Re: [haavard] How To Install A Longboard Center Fin ...

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haavard wrote:

Since this thread was ressurected and I was going to ask anyway, what is the correct way to set the box at the right depth? I route the hole for the box and set the box with the tabs resting on the glass. When I sand the box I can't sand it smooth, the slot sits deeper than the glass and only the lip around it is sanded away at the center (ends are fine). Should I route the hole shallow so the box sits on the foam/stringer at center and the center of the box is high enough? But then what's the point of the tabs on the sides?

Hey Haavard,

I know what you are talking about.  If the board has a lot of rocker in the tail, the center lip in the FU boxes dips below the surface of the board when you rest it on the tabs.  I don't know what everyone else does to solve this problem but I use 2" tape around the opening 1st.  I then place 4 tongue depressors on the board underneath the tabs parallel with the box..This helps to shim the box high enough so you can sand the center of the box flush with the board. Tape these in place with another layer of 2" tape.  They tongue depressors also act to center your box in the opening once the ooze of resin make the stringer harder to see.  I hope you can visualize this.

bluenose

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Re: [bluenose] How To Install A Longboard Center Fin ...

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Go back to page one. I posted a photo for you way back in the beginning. If the tabs work for you that's great! If not go with the Boxes from Fibre Glas Fin Co..........I use both systems


 

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