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 Post subject: Hex screw stuck advice
PostPosted: Tue Aug 14, 2018 6:37 pm 
King of the DuckBoard
King of the DuckBoard
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Joined: Sun Jan 28, 2007 12:30 pm
Posts: 24461
Location: weight weenie 26er
Please. Drill out? any other way to remove the centre hex?


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PostPosted: Tue Aug 14, 2018 6:54 pm 
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
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Location: Sunny Glasgow
Hammer in a flat bladed screwdriver :?

Is it seized and chewed off ?

If thats the case drilling the top off , will get the stem off, then grip the stump with moles. Failing that can you after drilling, will it hammer through ?


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 Post subject: Re:
PostPosted: Tue Aug 14, 2018 6:57 pm 
Retro Guru
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Joined: Sun Feb 08, 2015 8:51 am
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Location: Macclesfield, Cheshire
Next size up wrench plus hammer?

Stud extractor? conical bolt with opposite thread direction. Screw it into the top, crank up the torque with some lefty-tighty , out comes the bolt with the lefty-loosy.

Drill?

I suppose it depends what you have to hand and how little damage you want to do


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 Post subject: Re:
PostPosted: Tue Aug 14, 2018 7:03 pm 
Gold Trader / MacRetro rider
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Joined: Thu May 06, 2010 10:05 pm
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Location: Aberdeen
Is it just stuck?

Or is the bolt head rounded off as well?

What's the fork steerer? Carbon? Alloy?


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PostPosted: Tue Aug 14, 2018 7:17 pm 
King of the DuckBoard
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Joined: Sun Jan 28, 2007 12:30 pm
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Location: weight weenie 26er
the hex is rounded. But as i told a bike mechanic this he undid it!! But when i got home and went to undo the offending hex it wouldn't un screw. The hex went round. So rounded and very tight. The hex is hollow. 100% Carbon fork.

I like some of the suggestions Thks


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PostPosted: Tue Aug 14, 2018 10:44 pm 
Gold Trader
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Joined: Sat Oct 23, 2010 10:33 pm
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Location: New Forest
left handed drill bit or stud extractor.

I'd try an imperial hex bit, one will be *slightly* larger than that and hammer it in.

These'd make short work of it too. https://www.screwfix.com/p/screw-bolt-e ... UQodMIQIXA


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 Post subject: Re:
PostPosted: Tue Aug 14, 2018 10:51 pm 
Gold Trader
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Joined: Fri Jan 23, 2009 2:30 pm
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Location: Surrey
I've had success using a torx wrench in rounded Allen bolts. You might need to use some force to get the torx wrench in, but often it finds purchase without and you can unscrew. Good luck.


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PostPosted: Wed Aug 15, 2018 8:14 am 
Old School Grand Master

Joined: Mon Feb 11, 2008 9:42 am
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Aluminium or Ti?
If it's aluminium any of the hammering in options will work, with the added bonus of leaving your expander intact and ready to use. Failing that, just stick a 5.5mm/6mm drill bit in until the head pops off. It's even a nice shape for doing that!
Shouldn't take more than a couple of minutes.

Only issue with drilling is that you then need to get the shaft of the bolt out of the expander wedge........


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PostPosted: Wed Aug 15, 2018 8:37 am 
King of the DuckBoard
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Joined: Sun Jan 28, 2007 12:30 pm
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Location: weight weenie 26er
It's Aluminium. Me, my beloved T and a drill are very much a last ditch move. The mechanic pointed out the issue with the expander wedge and drilling. So off to the shed...
Thanks


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PostPosted: Wed Aug 15, 2018 11:31 am 
Old School Grand Master

Joined: Mon Feb 11, 2008 9:42 am
Posts: 3114
Good, a Ti one would require a BIG hammer and result in ruined tools. And the drilling would take ages........

TBH, if it's aluminium you should be able to grip (and mark) the top of any remaining shaft with a decent set of grips/pliers and turn it out.
Removing the cap will also give you access for penetrating oil etc. Which will ease the removal process.


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