Stripped out Foot Straps Srew Thread - help needed

Stripped out Foot Straps Srew Thread - help needed

Post by C H » Fri, 02 Jun 2000 04:00:00


How can I repair a stripped out/broken thread on the board for the
footstraps?

I have had a Tiga 281  for about 2 months now and I am just starting to use
the footstraps. The straps were already in place (the shop fitted them) and
up until now I had only used them to carry the board. However, when checking
the straps the srews on two of the straps were loose (one strap almost
completely off) and when I went to tighten them I found that the thread on
the board had been stripped. I assume from me carrying the board by the
straps.

I don't want to take the board back as this means a long discussion with the
shop and a long journey and then possible without a board for a while. I
also would like to know how to fix the problem myself as I imagine it is a
problem that will re-occur.

I am thinking of injecting an epoxy resin into the offending***holes.
Will this work of does anyone have any other suggestions? Also what is the
best stuff to use and how to I go about it?

Thanks,

Mike

 
 
 

Stripped out Foot Straps Srew Thread - help needed

Post by Roger Jacks » Fri, 02 Jun 2000 04:00:00

Mike:
Better I think to just get the next size larger diameter
Stainless steel (300 CRES alloy if possible) screws, and put
them in the stripped holes.
I don't like telling you this, but I can absolutely gaurantee
that you didn't "pull" the treads by carrying the board.
I suspect the shop personnel who installed the footstraps used
a "screw gun" to tighten them up, and overtightened them as a
result of having the gun set at too high a torque value.
The option is to use the adjacent***holes and forget about
the stripped out holes. Which set of holes is stripped?
Another option would be to check at your local auto parts store,
and see if they have the Locktite "Thread Renewal" kit.
This is a material you can pour into the damaged treads, and then
put the special "release agent" on the screw,***it into the
hole, let it set, and viola! you have new threads.
Another "hot tip" when installing footstrap screws, especially
for the first time on a new board, is to use a little soap or
paraffin (surfboard wax) on the threads to lubricate them and
allow the special self tapping "made for plastic"***threads
to really cut a nice initial thread in the insert. It also
reduces the torque required to tighten the screws dramatically.
If you can find one, get one of the F2 screwdrivers.
They are the absolute best tool to use on soft stainless
footstrap screws. You FS screws will last the entire life of
your board if you only use the F2 screwdriver to tighten them.
Special hardening and surface treatments on the tip, and
a much better geometry to the actual flutes, makes this the
superior tool for FS screws.
Later, Roger

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Stripped out Foot Straps Srew Thread - help needed

Post by Nick Key » Sat, 03 Jun 2000 04:00:00

On Thu, 01 Jun 2000 05:52:12 -0700, sailquik(Roger Jackson)

#Mike:
#Better I think to just get the next size larger diameter
#Stainless steel (300 CRES alloy if possible) screws, and put
#them in the stripped holes.
#I don't like telling you this, but I can absolutely gaurantee
#that you didn't "pull" the treads by carrying the board.
#I suspect the shop personnel who installed the footstraps used
#a "screw gun" to tighten them up, and overtightened them as a
#result of having the gun set at too high a torque value.
#The option is to use the adjacent***holes and forget about
#the stripped out holes.
#

I agree, everyone carries their board by the straps at some time.
Besides I put way more torque on the straps with my feet when I'm
sailing. I'm not sure what the hole area is like on the F2 but you may
be able to fill the hole and drill another hole near it.

 
 
 

Stripped out Foot Straps Srew Thread - help needed

Post by Wolfgang Soerge » Sat, 03 Jun 2000 04:00:00

Quote:

> On Thu, 01 Jun 2000 05:52:12 -0700, sailquik(Roger Jackson)

> #Mike:
> #Better I think to just get the next size larger diameter
> #Stainless steel (300 CRES alloy if possible) screws, and put
> #them in the stripped holes.
> #I don't like telling you this, but I can absolutely gaurantee
> #that you didn't "pull" the treads by carrying the board.
> #I suspect the shop personnel who installed the footstraps used
> #a "screw gun" to tighten them up, and overtightened them as a
> #result of having the gun set at too high a torque value.
> #The option is to use the adjacent***holes and forget about
> #the stripped out holes.
> #

> I agree, everyone carries their board by the straps at some time.
> Besides I put way more torque on the straps with my feet when I'm
> sailing. I'm not sure what the hole area is like on the F2 but you may
> be able to fill the hole and drill another hole near it.

I'd be careful with both of these suggestions: The strap inserts in
production boards are pretty thin and short these days, drilling a hole
next to the old one nearly certainly means disaster. A slightly wider
***may work but it must not be too long or you could poke through the
bottom of the insert. So the alternatives i'd consider viable are either
using another set of inserts or use epoxy: Fill in the hole. Then either
let set, drill it out and carefully***in the strap (may go a bit
hard the first time). Or, to get a really good thread: Put in the screw,
after greasing it with some oil or teflon spray, before the resin starts
setting. As soon as the resin sets to ***-like consistency,***out
the***again. If you wait too long, you may get screwed ;-) and not
get it out again. But gives perfect thread.

Btw, as the other said: Carrying a board by the straps does not harm the
insrts in any way, the forces encountered while sailing are far higher.
--
Wolfgang

 
 
 

Stripped out Foot Straps Srew Thread - help needed

Post by Roger Jacks » Sat, 03 Jun 2000 04:00:00

Nick:
Good point about staying with the same length!
But I did say to increase the diameter, which will put the
new threads in *** plastic.
**************************
 use epoxy: Fill in the hole.
That's what I said, but I suggested the LockTite thread repair
kit, which is some sort of epoxy, but super strength, made to
repair threads in machinery and automobiles. Very strong.
Another option would be to get a stainless steel plastic
thread insert and***it down into the footstrap plug.
Then you could use a regular machine***in the damaged hole.
Quote:
>Or, to get a really good thread: Put in
>the screw, after greasing it with some oil or teflon spray,
>before the resin starts setting. As soon as the resin sets to
>***-like consistency,***out the***again. If you wait
>too long, you may get screwed ;-) and not
>get it out again. But gives perfect thread.

Whoa, now that's a scary thought!
This is essentially what the Locktite thread reapir kit does,
without the risk of it seizing on the screw.
Regards, Roger

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Stripped out Foot Straps Srew Thread - help needed

Post by C H » Sat, 03 Jun 2000 04:00:00

Thanks for replying to my post.

After all your comments I think I'll take it back to the shop. I didn't
realise it could mess up the board or that it would not be guaranteed to
work. I bought it as a brand new board. So I am a little angry that two of
the threads are stripped without me even getting near the board with a***
driver!

The main problem is that the striped out threads are those furthest forward
on the front straps. So not good for learning, also I think I would like a
wide stance anyway as I am 6ft2 with long legs so I may need to  use this
position even when I am fully experienced.

Mike

 
 
 

Stripped out Foot Straps Srew Thread - help needed

Post by DavRay » Sat, 03 Jun 2000 04:00:00

If they are the junkie plastic inserts, I vote for using slow cure, thickened
resin and then waxing or greasing the***when you replace the straps.  The
screws will still be removable, the fix will be permanent.  
There is some timing involved with this method but it works. Most stores that
sell marine epoxy will have free manuals describing  this process. And you
don't have to remove all of the old insert, just the loose pieces, clean it up,
maybe bore the hole a tad carefully and you are set. Use something on the drill
bit to prevent going in too deeply such as *** tubing. You just want about
3/4 of an inch of drill bit exposed.                 Dave    
 
 
 

Stripped out Foot Straps Srew Thread - help needed

Post by Robert Dunlo » Mon, 19 Jun 2000 04:00:00

Mike,

You didn't say what kind of board or what is in the deck where the straps go.
Many boards have a plastic insert like the plugs used to attach things to
plaster or brick walls.  If this is the case all you need are 'fatter'***but
not too long or they will go right through into the board.  The plastic plugs
can be drilled out if they are ***ed and new plugs glassed back in.  They can
be purchased from most windsurf shops.  You must find out what the material your
board is made from, the type of foam inside.  Polyester resin melts some foams
and so you may have to use Epoxy resin to match your board.

Good luck,

Bob Dunlop