Tend lapping machines that polish flat surfaces of round jewel bearings.
What does a Jewel Flat Surfacer do?
Tends lapping machine that polishes flat surfaces of round jewel bearings: Blocks in molten shellac in circular row near outside edge of flat, circular steel block. Sets blocks, usually four or five at once, in holding chuck and turns screw press to force blocked jewels against diamond dusted revolving lap. Observes polishing to detect signs of overheating and removes hot block for cooling before shellac melts and jewels are damaged by being turned on edge. Examines finish of jewels for appearance with loupe and verifies thickness with upright dial gauge.