A) forming a race containing a plurality of {HEAD ~ balls} and {TAIL ~ a hole}, wherein a burr is formed on the hole protruding outwards 
A ) forming a race containing a plurality of { HEAD ~ balls } and { TAIL ~ a hole } , wherein a burr is formed on the hole protruding outwards
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH