Contact   Imprint   Advertising   Guidelines

Please help to unscrew foil mast

A forum dedicated to Hydrofoil riders
User avatar
bragnouff
Very Frequent Poster
Posts: 1104
Joined: Tue May 14, 2002 1:00 am
Kiting since: 1999
Local Beach: New Brighton
Gear: Alkita boards
Zeeko Slash/AirWave/Scrambler
Spitfire XLW/ XXLW. GoFoil Kai/Iwa
GK Trix
FS Peak4
HB Legion
Ypsilon
...
Brand Affiliation: GK enthusiast
Location: Te Wai Pounamu
Has thanked: 36 times
Been thanked: 142 times
Contact:

Re: Please help to unscrew foil mast

Postby bragnouff » Tue Jul 27, 2021 6:34 am

Also in the future use A4 grade stainless steel hardware. A2 doesn't really do the job in marine environment.

To get it out, if you cannot find that extractor drill bit, you could drill it out with normal drill bit. Take your time, spray some lube as you go, and cool it down frequently.

Foil
Very Frequent Poster
Posts: 1362
Joined: Mon Oct 23, 2017 7:44 pm
Kiting since: 2000
Local Beach: New Brighton- nr Liverpool. Open sea with big low tide lagoon
Favorite Beaches: New Brighton, Rhosneigr, Fleetwood, Newbrough
lake Como (Italy)
Style: hydro foiler since 2017
Gear: Groove Skate 110 custom graphics, 2021 edition
101cm SAB Moses mast
and wings 633 and the new 670 race set on the red fuse
TTip's Nobile 139/136/134
Ozone Chrono V4 11mtr,
Core kites, Nexus V2s, 9mtr 11mtr (7mtr on order)
Duotone click bar 2020, my own custom made lines
Ozone V4 click in bar, my own custom made lines
race lines and standard bar lines made up to any length any strength
most colours available, red-black-gold-vivid blue-pale blue
lines of all strengths, depower+ power lines fitted, just ask me.
free fitting service with quick turnaround
Brand Affiliation: None
Has thanked: 112 times
Been thanked: 285 times

Re: Please help to unscrew foil mast

Postby Foil » Tue Jul 27, 2021 7:22 am

easy job,
I see its a Moses mast fixed to a Groove Skate, same as mine then!
same fixing hardware, a few tried a tested ways to tackle this.( the hammering in a oversize HSS hex head key is a first try method but if that fails then this next method will not fail-)
firstly we know that's a stainless steel 8mm threaded stud under that now damaged button head, and the stud is clamping the boards mast track to the board using the brass T nut, there will be a small gap under the bottom of that 8mm stud, so use a 8mm HSS (black best quality) drill bit and insert it into a good mains powered hand drill, have a can of WD40 handy for cooling and lube, set on high speed and get your weight over you hands to control the drill as you carefully drill down, the job should be done quite quickly and easily, the top of the stud will spin free as you press through and then the stud that left will fall back to the bottom of the boards track, then your mast will lift clear, easy peasy.
the stud should then be easy to unscrew from the released Tnut after sliding it out of the track, renew all your mast bolts with either the ones from groove, or Bolt Base if here in the uk, and use only the best SSteel keys in future, these ones are the best, special ends to prevent damage to both key and button heads --

pākihiroa
Medium Poster
Posts: 132
Joined: Thu Mar 06, 2014 10:24 am
Gear: Cabrinha
Brand Affiliation: None
Has thanked: 39 times
Been thanked: 23 times

Re: Please help to unscrew foil mast

Postby pākihiroa » Tue Jul 27, 2021 1:43 pm

edt wrote:
Tue Jul 27, 2021 4:04 am
You can also get a torx but that is one size too big and just hammer it until it smashes itself in place. Thats what I try first.
You could complement this approach with a manual impact driver, eg:



The impacts tend to wedge whatever shape/size driver bit you choose to use into the remnants of the screw head while at the same time helping to 'shock' the seized bolt loose.

CAUTION: An impact driver is a handy option when dealing with heavy duty parts, like a screw that is rusted into something solid like an engine block. Not so sure I would want to use it on a delicate board though.

Hugh2
Very Frequent Poster
Posts: 1235
Joined: Tue Oct 30, 2012 3:38 am
Kiting since: 2005
Weight: 190lb
Local Beach: Central Illinois
Favorite Beaches: Cape Hatteras and Cape Town
Style: freeride
Gear: Cabrinha Nomad 5.5, Best Cabo 6, Naish Pivot 6, 7, 9, 10 and 11, Cabrinha Vector 12
Long Ocean 136, Cyclone 138, Fone Surf 5'11", Naish Global 6'0", Cyclone 6’0”, Slingshot Hoverglide H5 foil and Alien Air 4' 6" and Converter boards
Brand Affiliation: None
Has thanked: 57 times
Been thanked: 165 times

Re: Please help to unscrew foil mast

Postby Hugh2 » Tue Jul 27, 2021 1:50 pm

Has anyone tried soaking something like this in vinegar overnight first, it would remove much of the corrosion that is locking in the bolt.

ronnie
Very Frequent Poster
Posts: 4072
Joined: Sun Jul 24, 2005 6:39 pm
Has thanked: 18 times
Been thanked: 34 times

Re: Please help to unscrew foil mast

Postby ronnie » Tue Jul 27, 2021 3:06 pm

Hugh2 wrote:
Tue Jul 27, 2021 1:50 pm
Has anyone tried soaking something like this in vinegar overnight first, it would remove much of the corrosion that is locking in the bolt.
I did that to take my NP Glide Tuttle head off the aluminium mast. The bolts wouldn't budge before using the vinegar.

I poured some white vinegar into the inverted mast and let it soak into the bolt ends overnight, then used a Torx levered screwdriver with the mast clamped tight and that was enough to unscrew it. The NP bolts had Tefgel on them, but I hadn't unscrewed them for about a year.

SMJ
Frequent Poster
Posts: 226
Joined: Sat Nov 21, 2020 11:29 am
Kiting since: 2040
Gear: Cabrimha, Core, Flysurfer, Carved, Naish, Duotone, Ocean Rodeo, Slingshot, Liquid Force, Lift, Spleene, Mystic, ION.
Brand Affiliation: None
Has thanked: 46 times
Been thanked: 48 times

Re: Please help to unscrew foil mast

Postby SMJ » Wed Jul 28, 2021 1:50 am

BWD wrote:
Tue Jul 27, 2021 5:45 am
SMJ wrote:
Tue Jul 27, 2021 4:23 am
Heat (propane torch) combined with an ez-out style extractor tool. You may need to drill the head prior to using the extractor.
Just take a torch to the old epoxy carbon composite.
Not.
Besides ez out another thing you can do is just put a drop of epoxy in the socket and stick a normal hex wrench that would fit if the docket was mot stripped in it. Let harden over night and you may find it unscrews fine. If not, on to the hardware store got extractors….
Save the propane for the stove.
BWD clearly doesn't have much experience with seized bolts. You don't need much heat; a little goes a long way.

See this video for the non-believers.


Video for using extraction tool:


Yet another method using a Dremel:

User avatar
bragnouff
Very Frequent Poster
Posts: 1104
Joined: Tue May 14, 2002 1:00 am
Kiting since: 1999
Local Beach: New Brighton
Gear: Alkita boards
Zeeko Slash/AirWave/Scrambler
Spitfire XLW/ XXLW. GoFoil Kai/Iwa
GK Trix
FS Peak4
HB Legion
Ypsilon
...
Brand Affiliation: GK enthusiast
Location: Te Wai Pounamu
Has thanked: 36 times
Been thanked: 142 times
Contact:

Re: Please help to unscrew foil mast

Postby bragnouff » Wed Jul 28, 2021 3:11 am

Was that sarcasm???
You say that a little heat goes a long way, yet in the video you link to support your claim he's quite happily getting that aluminium mast "extremely hot". That wouldn't go too well on epoxy / carbon. And he actually says in the video that it would melt it...
Aluminium is also potentially sensitive to heat, some alloys lose some of their molecular properties when heated, when welded, for instance.

So taking that blowtorch out to achieve your goal should be at the very bottom of your list of options. And in that particular case, you'd want to heat/expand the brass Tnut in the rail, while keeping the bolt cool. That's not really accessible to your blowtorch, and the nylon of the US box wouldn't really like a heated brass nut.
Anyway plenty of mechanical options have been suggested.
And of course, cursing and swearing always help!

User avatar
edt
Very Frequent Poster
Posts: 6224
Joined: Fri Jul 16, 2010 6:27 am
Kiting since: 2010
Local Beach: Michigan
Gear: slingshot liquid force wainman pansh naish duotone cwb burton ronix ozone cabrinha north flysurfer duotone
Has thanked: 204 times
Been thanked: 248 times

Re: Please help to unscrew foil mast

Postby edt » Wed Jul 28, 2021 4:09 am

Lol that aluminum lost all it's hardness. Take any aluminum thing throw it in the oven put it at 600f/315c and it will fold in your hands like putty. I've ruined some aluminum cooking trays that way before. Propane torches get up to several thousand degrees. Be careful with heat! Next hard tack that mast in the video is snapping in two. Hilarious how to not do it video. Steel can take a lot more heat don't use your bolt tricks for steel on aluminum and don't even talk about carbon it will catch on fire.

Just use the techniques everyone listed above we all use the same tricks

kiteband
Rare Poster
Posts: 33
Joined: Thu Feb 25, 2021 8:59 pm
Gear: Slingshot
Brand Affiliation: None
Has thanked: 0
Been thanked: 3 times

Re: Please help to unscrew foil mast

Postby kiteband » Wed Jul 28, 2021 6:32 am

SMJ wrote:
Wed Jul 28, 2021 1:50 am

See this video for the non-believers.


Video for using extraction tool:


Yet another method using a Dremel:
As much as I am worried about the first video I enjoyed the other two videos. Thanks!

User avatar
MattyM
Medium Poster
Posts: 95
Joined: Mon Apr 07, 2014 5:29 pm
Gear: Core, F-One, Moses
Brand Affiliation: None
Has thanked: 8 times
Been thanked: 22 times
Contact:

Re: Please help to unscrew foil mast

Postby MattyM » Wed Jul 28, 2021 11:15 am

JoseTumaco wrote:
Mon Jul 26, 2021 11:22 pm
And what could I do so that this does'nt happen to me again?
If you were indeed using a torx key, that looks like an allen bolt, so use an allen key instead.


Return to “Hydrofoil”

Who is online

Users browsing this forum: No registered users and 13 guests