Flat Surfacer, Jewel
Overall rating: (N/A)
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Tends lapping machine that polishes flat surfaces (ends) of
round jweel 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 holdnig 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 luope and verifies thickness with upright
dial gauge.
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Flat Surfacer, Jewel
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