cutting center pins

[PNOTNR@aol.com]

In a message dated 98-02-13 00:20:38 EST, you write:

<< The center 
 pin has to cuts, one on each side. The rough jagged cut from the 
 technician, and the smooth, unburred factory cut. >>

This has had me wondering for a long time......HOW does the factory get the
smooth, unburred cut?  

Gordon Large, RPT
Mt. Vernon, ME