I had to replace the arbor bearing on my old Sears Contractor Table Saw. I bought a new E Clip because the original seemed to be bent. I eventually realized that the new flat E Clip was not holding the shaft as tight as the original and there was a small amount of side to side play in the shaft and saw blade. I'm wondering now if the E Clip should in fact be concave in order to provide adequate pressure and stop any side to side movement. If the E Clip is supposed to be concave should the concave be facing inward or outward when installed? I don't remember the position when I originally removed it.....but I did keep it.