The removal of the gate surface
Flatten the outer diameter of the tapered (Rough grinding)
Processing Using the Taper wire to drill a micro hole in the ferrule
The removal of the top surface
Issues a coaxial grinding the outside diameter based on the micro hole of the ferrule
Made to an outside diameter and surface coarseness with high precision
Take the outer perimeter edge of the ferrule
The removal of the top and end surface
Process the tip of the blank into a spherical surface form