This opening portion is in {HEAD ~ contact} with {TAIL ~ ball} 12 at the minor axis position of cam 7, i.e., at the position of the X X axis in FIG 5, thereby preventing retainer 13 from moving in the direction of outer race 11, as shown in FIGS 6A and 6B 
with
This opening portion is in { HEAD ~ contact } with { TAIL ~ ball } 12 at the minor axis position of cam 7 , i.e. , at the position of the X X axis in FIG 5 , thereby preventing retainer 13 from moving in the direction of outer race 11 , as shown in FIGS 6A and 6B
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH