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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by robgul on Today at 03:58:32 pm »
I would try the sacrificial Allen wrench but with 2 part epoxy rather  than superglue and giving it at least 5 hours to cure  - the screw extractor idea sometimes works but they are really designed for woodscrews, not torqued up bolts.

Drilling the head of any of the bolts on an a-head stem is not a good idea as it will be almost impossible to remove the remaining bit of bolt.

. . . and if comes to it, man-up and use an angle-grinder - much quicker than a hacksaw!!
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by rogerzilla on Today at 03:54:13 pm »
If it's an A-head, it's much easier, then!
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by Sergeant Pluck on Today at 03:39:16 pm »
Quote from: rogerzilla on Today at 03:30:51 pm
16Nm is normal for a quill stem, which is pretty tight using a normal length 6mm allen key.

I am hazarding a guess that it is not a quill.

https://yacf.co.uk/forum/index.php?topic=128487.0
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by ACyclingRooster on Today at 03:36:27 pm »
Hi Andy. Which bolt or bolts are affected and what is access to the heads like ?
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by rogerzilla on Today at 03:30:51 pm »
16Nm is normal for a quill stem, which is pretty tight using a normal length 6mm allen key.
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by Sergeant Pluck on Today at 03:18:42 pm »
Drill in a little to allow a screw extractor enough purchase. Or superglue a sacrificial slightly too small bit in.

Even though they have been rounded off, they still won’t have been torqued up that much or the thread would have stripped.

Is this the bike recently in the sales forum? Well bought, if so.
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by andyoxon on Today at 03:05:02 pm »
Thx.  I tried the torx bit earlier, size below too small, next one too large & didnt seem like it would hammer in - though I could try resting the side of the stem on a large vice & then try.  I have steel drill bits so could try that method.
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by rogerzilla on Today at 03:01:02 pm »
You only have to drill the head off.  It may be easier than hacksawing the stem, and saves the stem.
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by Jurek on Today at 02:56:02 pm »
^ That would probably be my first port of call as well.
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The Knowledge / Re: Removing rounded off / seized hex bolts...
« Last post by PaulF on Today at 02:49:23 pm »
Can you drive a Torx bit in? And then use that to extract the bolt?
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