Originally Posted by
KingdomRacer
I would not drill into that screw/crank without it clamped on a drill press or mill.
This!
It needs to be clamped down in a press or lathe to ensure you're drilling into the center point of the screw... otherwise you're just going to 'walk' the bit straight into the edge of the screw/crankshaft/threads and damage it.
Any machinist should be able to get it out without a problem.