Forums > Kitesurfing Foiling

Slingshot Hoverglide - adjustable mast lengths seized due to corrosion

Reply
Created by ridgeydidge123 > 9 months ago, 31 Jan 2019
ridgeydidge123
VIC, 29 posts
31 Jan 2019 2:30PM
Thumbs Up

Hey guys,
Wondering if anyone knows where I could find someone with the tools/expertise to drill out some corroded bolts - I'm currently stuck with the 30" mast and would like to be able to put the larger size on. Also would be good to be able to pack it flat for travelling.

Paying the price for being lazy and leaving stainless steel bolts in an aluminium mast... I should have known better.

ActionSportsWA
WA, 950 posts
31 Jan 2019 12:13PM
Thumbs Up

Hi Ridgey,

Unfortunately for you, the bolts aren't stainless. They're Titanium! Stainless is soft, Titanium isn't. You may have to drill the heads off using a cobolt drill and then use heat and penetrene, coupled with vice grips or a strong vice to loosen them up.

Start by soaking them in Penetrene or diesel fuel, same thing ... kinda. Use cutting fluid on the drill and keep the speed down and you should be fine. It can be done, but it's a mission and will lead to the destruction of the bolts but hopefully not the threads in the mast.

Next time, use Tef-Gel

DM

warwickl
NSW, 2173 posts
31 Jan 2019 6:08PM
Thumbs Up

Maybe just cut the mast below the bolts.
Destroy the small bit of mast left on the bolts and rethread the shorten mast.
Or move on with your longer mast.

Kamikuza
QLD, 6493 posts
31 Jan 2019 5:13PM
Thumbs Up

At the fuselage or plate?

My second foil I chose SS because the spare parts were cheap... For that very problem.

ridgeydidge123
VIC, 29 posts
1 Feb 2019 9:09AM
Thumbs Up

Thanks for the info guys. At the very least this has confirmed my view that this might be outside my limited skills to fix.

@Yamikuza - its jammed at both the plate end and the foil end of the mast - both sets of bolts corroded.

Nik
WA, 25 posts
1 Feb 2019 6:45AM
Thumbs Up

Hey mate, what state are you in ?? If you're in WA, I can have a look at it for you. I have fixed a quite a few for my local shop
Sometimes pain free, but mostly requires some good drilling skills, and potentially loosing a couple of centimeters off your mast, which I can then re-tap to accept some nice fresh bolts

froghoppa
NSW, 32 posts
1 Feb 2019 6:57PM
Thumbs Up

Have you tried heating the froozen bolt [s'] by way of holding a soldering iron on it till she's hot then just fether it back and forwards for a little time. Once you have allowed it to cool while doing the others apply lube or penetrating fluid and take your time trying to get some gains. Re-lubing often. If you manage to get them slightly free you will be able to remove them. However you Must take your time, winding out only a very small amount then lube and wind it back in repeating this process while sipping cold beer. Good luck.
P.s this process works 90 % of the time and it has saved many of my clients hundreds if not thousands of dollars over the years.

drsurf
NSW, 177 posts
1 Feb 2019 10:47PM
Thumbs Up

On the theme of applying heat but avoiding damage, get a decent sized vessel you can put the mast fuselage end into, fill the vessel with water and heat it to boiling. Put the respective end of the mast into the boiling water and leave it until it is good and hot. Take it out and dip it into cold water until it cools down. See if the screws are removable. If not repeat.

This method depends on the expansion and contraction of metal and the fact that boiling water tends to dissolve aluminium corrosion. Had to employ this method on many corroded aluminium zippers

Good luck, Dave

Kamikuza
QLD, 6493 posts
2 Feb 2019 11:38AM
Thumbs Up

Select to expand quote
ridgeydidge123 said..
Thanks for the info guys. At the very least this has confirmed my view that this might be outside my limited skills to fix.

@Yamikuza - its jammed at both the plate end and the foil end of the mast - both sets of bolts corroded.


Gawd next time, TefGel and Torx bolts.

ridgeydidge123
VIC, 29 posts
4 Feb 2019 8:50AM
Thumbs Up

Select to expand quote
Nik said..
Hey mate, what state are you in ?? If you're in WA, I can have a look at it for you. I have fixed a quite a few for my local shop
Sometimes pain free, but mostly requires some good drilling skills, and potentially loosing a couple of centimeters off your mast, which I can then re-tap to accept some nice fresh bolts


Thanks for the offer - very generous, but I'm in Vic!

weebitbreezy
617 posts
4 Feb 2019 8:44PM
Thumbs Up

If you can still get some purchase on the stuck bolt you may have a chance.

Did a similar thing to my Shinn fuselage - although that was a bolt for the wing rather than the mast (shorter). I ripped half the head off my bolt so had to carefully dremel a notch for purchase but was still able to get it out.

Basically heat the aluminium with a hot air gun ( I tried a soldering iron but it didn't get hot enough) and then touch a candle to the top of the bolt. The wax should melt down through the screw thread gradually making its way past the seized area of thread. It will take quite a while as there is a lot of thread to penetrate but it should be possible. Took about 15 minutes to get my bolt free (only about 20mm of inserted thread). I'm thinking for the larger thread in a mast joint you should give yourself about 30-45 minutes. Good luck.

ActionSportsWA
WA, 950 posts
4 Feb 2019 9:37PM
Thumbs Up

Don't be cutting bits off it. If you are in WA, bring it into the shop and I'll get it apart for you.

DM

benmj
VIC, 71 posts
5 Feb 2019 1:02PM
Thumbs Up

In VIC
You could bring it to the Foilsport Factory / workshop and I will give you a hand.
4 Bibby court moorabin , PM me if you like



Subscribe
Reply

Forums > Kitesurfing Foiling


"Slingshot Hoverglide - adjustable mast lengths seized due to corrosion" started by ridgeydidge123