{HEAD ~ The opening portion} at the side of inner ring 10 formed at the edge portions of two holding surfaces 16 adjacent in the circumferential direction is smaller in {TAIL ~ size} in the circumferential direction than the diameter of ball 12 
is smaller in
{ HEAD ~ The opening portion } at the side of inner ring 10 formed at the edge portions of two holding surfaces 16 adjacent in the circumferential direction is smaller in { TAIL ~ size } in the circumferential direction than the diameter of ball 12
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH