Job Description:

• 1) Operates battery of horizontal, multispindle, drilling machines to drill center holes in round jewel bearing blanks: Puts molten shellac on end of work spindle and centers jewel on spindles, using small, hand centering tool.

• 2) Fits drill bits in soft shellac in drill head.

• 3) Trues up bit by holding bit lightly with tweezers to detect any play indicative of poor alignment; straightens bit by moving its tip slightly to eliminate play.

• 4) Inserts work spindle, applies diamond dust with wire to drilling point, and removes jewel when spindle spring opens and thus indicates hole is drilled.

• 5) Inspects holes for size by manually turning them on standard bit used as gauge.