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