Job Description:

• 1) Tends grinding machine that grinds sapphire squares to disk shape, for use as jewel bearings: Glues specified number of sapphire squares together to form stack.

• 2) Positions stack between abrasive and rubber rolls of grinding machine and starts machine that grinds sapphires to disk shape.

• 3) May operate similar machine equipped with diamond-dust-coated wheel to smooth edges of sapphire disk.