Each pocket is formed into a shape forming a narrow opening portion at {TAIL ~ the inner race side} and a wide opening portion at {HEAD ~ the outer race side} 
Each pocket is formed into a shape forming a narrow opening portion at { TAIL ~ the inner race side } and a wide opening portion at { HEAD ~ the outer race side }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD