{HEAD ~ The opening portion} formed at {TAIL ~ the edge portions} at the side of outer race 11 is larger in size than the diameter of ball 12 
formed at
{ HEAD ~ The opening portion } formed at { TAIL ~ the edge portions } at the side of outer race 11 is larger in size than the diameter of ball 12
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH