Originally Posted by
stanmah
The BB is a shimano square taper cartridge type...
I am positive I am turning the BB in the correct direction. As well, both my LBS and my shop have tried the frame levering method. After putting the electric impact wrench to it, I am nervous about applying more torque and damaging the frame.
Both sides are stuck.
Has anyone encountered a BB that they were unable to remove?
Many years ago, the shop where I worked received a Cinelli frame that the owner had chromed. Since he wasn't a bike mechanic, he took off all he could, leaving the fixed cup in place. That's right, they chromed the whole thing with the Campy BB cup still stuck. After several tries with various wrenches, we finally resorted to surgical removal- I think it took a dozen carbide hacksaw blades to reduce the cup to 4 pieces... and several evening's labor. We got it out, though. Eventually returned the bike to service, too
Surgical removal may be your only alternative. If it's an aluminum cup it should be pretty easy to kerf the cup from the inside and then collapse it. Saw carefully and you won't damage the threads, but be prepared to chase them afterwards.
And use anti-seize next time!