Bolt extraction

[Parrot of Doom]

Whoever built my new bike has overtightened the front dérailleur bolt so much that today it pinged off into the canal, leaving me with no gear selection. While not a massive problem, the threaded part of the bolt (the one that grips the cable) is stuck in the mechanism.

Anyone ever tried extracting such a bolt? I'm happy to give it a go, and frankly I can't be arsed with Merlin Cycles any longer. I'm going to go over the bike to see what other mistakes they've made. In 20 years of messing with bikes I have never snapped a bolt.

[mk1fan]

Molegrips on the exposed part of the thread.

That's what happens when you buy French. Loads of stuff fall off in the first month. Then, what's left, goes on for ages.

[Parrot of Doom]

None of it is exposed, and its Japanese.

Edited by Parrot of Doom on Thursday 11th September 18:19

[mk1fan]

You're fked then.

Only kidding. Can you not reach the back of the screw and twist it out?

Or score a groove in the top bit of the thread and use a flat bladed screw driver to undo it.

Or drill a small hole in the middle of the screw, bang in an allen key and undo it.

Or use a screw extractor bit - available from B&Q or such like.

[Saddle bum]

Drill it and use an "Easy Out". Soak in freeing oil first.

[Nick_F]

If the head's come off then there shouldn't be any tension in the bit that's left.

[Parrot of Doom]

£25 for a new mech. fk it, bought one. I'll sort the bolt on the old one in the vice and flog it on Ebay as nearly-new.

[DRB]

It was me that sold you the front mech! Small world.... hope you got it fitted ok.

[Parrot of Doom]

Ah hello mate Thanks for your help