Removing allen bolt

[hamster]

Any advice on removing an allen bolt with a mangled head? It's in the BB eccentric clamp for my retro Dawes ATB tandem.

I've soaked it in Plus Gas, and will try a stud extractor after a bit of heat, un less someone has a better idea.

I could try bashing in a torx one size larger I suppose.

 

[tintin40]

tried drilling it out?

 

[Kestonian]

Use a Dremel or similar (like an angle grinder but much smaller is the best way I can describe it!) to form a crosshead on top of the bolt and use a screwdriver?

 

[orange71]

or if it isn't recessed, cut a slot in it with a hacksaw and use a flat head driver to get it out

 

[johnnyw]

As above but maybe try an impact driver if you have one, save risking it chewing up again.

 

[Martin]

You can try to smack a "torx" device in it and adjust. (thats how we call it in Holland, some kind of allen tool but with 8 points on it.... :? )

 

[jonrock]

EASY OUT TOOL!
J

 

[Err]

You can try to smack a "torx" device in it and adjust. (thats how we call it in Holland, some kind of allen tool but with 8 points on it.... :? )

Torx has 6 points. like an *

Sometimes i toy with the idea of changing all the bolts on my bike to torx, or triple square (double allen).

 

[greenstiles]

if there is enough head showing, put mole grips on very tight, and get a sleave, like length of scaffold to put over mole grips for leverage.

 

[P20]

Which type is it? Is a clamp across a split shell or an expanding wedge internal/external bolt?
If its a split shell, i'd just hacksaw it. Otherwise drill the head off and then set about it with a hammer :twisted: