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Have you heated it? They come with thread lock pre-applied, so if it was put in dry from new you might get a result from softening the glue.
On the other hand, if it was put into a steel frame dry and has got wet at any point in its life, it might be properly seized and you're going to have to cut it out.
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Have you (or the lbs) tried with the tool in a vice?
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Depends.
Got photos of the frame and BB? What frame material? Also, what tools were used?
For stucked BBs I usually secure the BB tool with a Pedros tool, spanner of your your choice and a cheater bar.
Then hot water on the BB shell, leave it for 5 minutes and push down hard, hold it and increase torque.
Do not be tempted to yank at it, the key is to keep the pressure on and increasing it.
Might be obvious but what threading is the frame?
My favourite combo is a Park Tool BB tool, Park tool cheater bar, the aforementioned Pedros tool, a Brompton seatpost for extra leverage and hot water, have not been defeated yet.
If you're in London, drop me a PM and I'll be happy to give it a go.
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gbj_tester
M_V
coventry_eagle
@arkeebs
Hi all, Got a track octalink bb in a frame that I (+ LBS) am unable to remove with the normal shimano tool. Any recommendations as to why/ anyone experienced the same?