Forums > Stand Up Paddle General

Fin keeps coming loose.. any tips?

Reply
Created by Nugdam 1 month ago, 21 Apr 2019
Nugdam
QLD, 259 posts
21 Apr 2019 3:08PM
Thumbs Up

I have a thruster fin that keeps coming loose, Both grub screws are an issue. They don't seem stripped as they do back up tight so I'm thinking a bigger grub screw wont help.

I tried a bit if thread tape this morning to see if that would help grab but they were loose again mid way through a session.. luckily I attached a fin key to my leash now.

I'm not sure what to try next? There are groove marks on rhe fins so I'm wondering where the screws are causing grooves which is causing play?

Any suggestions?

Foghorn
WA, 129 posts
21 Apr 2019 1:28PM
Thumbs Up

Medium threadlock the blue stuff.

FRP
257 posts
21 Apr 2019 9:05PM
Thumbs Up

Interesting problem. I suspect that part of the issue may be that the two tabs in the fin box may not be snug enough when you first put them in? If so, try to tighten them up a bit with either a shim or a bit of tape on the tabs. If the tabs are sloppy in the box before you tighten the screw they will gradually loosen the screw.

Bob

Nugdam
QLD, 259 posts
22 Apr 2019 9:18AM
Thumbs Up

Select to expand quote
FRP said..
Interesting problem. I suspect that part of the issue may be that the two tabs in the fin box may not be snug enough when you first put them in? If so, try to tighten them up a bit with either a shim or a bit of tape on the tabs. If the tabs are sloppy in the box before you tighten the screw they will gradually loosen the screw.

Bob


I was thinking of something similar to that do a couple wraps with some electrical tape to see if it tightens the fin up. I'll have a look later to see if there is any noticeable play in the fin.

colas
3148 posts
22 Apr 2019 12:26PM
Thumbs Up

Select to expand quote
Nugdam said..
I was thinking of something similar to that do a couple wraps with some electrical tape


Same, but I would use some incompressible material: bits of radiographic film, water bottle...
If it works, superglue them to the tab.

Tardy
2942 posts
22 Apr 2019 12:34PM
Thumbs Up

never had much luck with lock nut ,so i use to dip them in glue on my naish boards ,they still all wind out ok .

cbigsup
326 posts
26 Apr 2019 7:06AM
Thumbs Up

Had that problem with a futures box. Sliced beer can strips in the box and a grub screw a little longer than stock.

Voila! Just like downtown!

Bighugg
NT, 174 posts
26 Apr 2019 10:53PM
Thumbs Up

Re Screws, most supplied are stubby, not allowing much thread turns to grip . Your local surf shop may have longer screws for longboard side fins or checkout your local Nut n Bolt wholesaler, to get longer length screws in your current thread pitch. Compare what's your best bet for oversized whilst you're there. ENJOY



Subscribe
Reply

Forums > Stand Up Paddle General


"Fin keeps coming loose.. any tips?" started by Nugdam