Robert, those teeth are actually the retaining/locking rings for the nut that holds those very roller bearings in place. I just flatten them with a hammer, cut out the section I need. If I want smiley teeth (8-)), I heat it gently (they are thin) with a torch to "back bend" them. Wish I had pictures but you get the idea. I've toyed with the idea of using the same concept on gears and cogs. Heres another, but harder to see them. Scott.