Bearings should be pressed on, beyond that there should have been a snap ring holding it in place. There's not supposed to be any foward movement in that shaft. When I have a shaft that a bearing falls off of, I center punch 6 dimples around the circumfrance of the shaft where the bearing fits on. Then it will accept press. If the bearing is loose on the shaft, the shaft can spin inside the bearing, stainless on stainless with that kind of friction = gawling. I've seen bearings welded to shafts.