Originally Posted by
dabac
I’ve broken a vise on a stuck BB once. I’ve had good luck with the bolt-and-washers method. Once or twice I’ve welded a piece of steel to the cup to get some solid leverage.
Good heavens! What was the failure mode of the vice? What broke?
I'm thinking a Wilton or Yost (non-swivel is best). I have a Yost (with the swivel).
The welding approach has the advantage that you are adding heat to the system.