The balls are in contact with the opening portion at the inner race side in {HEAD ~ the pockets} at the minor axis positions of a drive cam, and the balls are in contact with substantially the central portion of the pocket inner surface at the major axis positions of {TAIL ~ the cam} 
The balls are in contact with the opening portion at the inner race side in { HEAD ~ the pockets } at the minor axis positions of a drive cam , and the balls are in contact with substantially the central portion of the pocket inner surface at the major axis positions of { TAIL ~ the cam }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL