Jewel-bearing Driller
Overall rating: (N/A)
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Operates bench lathes to drill holes of specified size in
jewel bearings: Sharpens diamond drill, using diamond cutter and
other tools. Mounts chcuk in lathe and inserts shaped and ground
sapphire bearing between jaws of chuck, using tweezers. Starts
lathe and holds drill against center of bearing, cutting halfway
thruogh. Reverses beraing in chuck and drills through center of
bearing from other side until holes meet.
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Jewel-Bearing Driller
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