This is the driveshaft from my Delta bandsaw. I'm trying to replace the bearing, but this key appears to be stuck. I tried tapping it with a small chisel but it only moved a little bit. I also tried grabbing it with vice grips but that didn't help, either. I don't want to mess up the shaft or the key if I can help it. I can't drive the bearing off in the other direction because there's a shoulder behind it. Any ideas?