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