System for grinding a workpiece

A machine for regrinding a component part of a constant velocity universal joint, said constant velocity universal joint having ball bearings, an outer housing with an outer ball race member and an inner ball race member, said members provided with curved ball receiving grooves, and a ball cage between said members having ball containing grooves, comprising:

• (a) means for holding said component part, comprising a chuck mechanism and an adaptor for mounting said component in said chuck mechanism;
• (b) a grinding bit comprised of a grinding tip, wherein said grinding tip comprises boron nitride and consists essentially of a steel blank coated with cubic boron nitride;
• (c) rotatable support means for supporting said chuck mechanism, wherein said rotatable support means is comprised of means for disposing said component part contacts said grinding tip of said grinding bit in such a manner that said tip contacts said surface at a specified angle of incidence;
• (d) means for rotating said rotatable support means in order to change said angle of incidence between said grinding tip and said surface of said component part;
• (e) a motorized grinding tool comprised of said grinding bit, wherein said grinding bit has a head larger than the diameter of the original ball bearings;
• (f) means for adjusting the position of said motorized grinding tool in the Z axis to move said motorized grinding tool up and down;
• (g) means for adjusting the position of said motorized grinding tool in the Y axis to move said grinding tool in and out;
• (h) a lubricating fluid injection system for lubricating said component part and said grinding tool during the grinding operations;
• and
• (i) a protective enclosure surrounding the grinding machine components for containing lubricating fluid during grinding operations.