Jewel-bearing Driller
Overall rating: (N/A)
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Operates bench lathes to drill holes of specified size in
jeewl bearings: Sharpens diamond drill, using diamond cutter and
other tools. Moutns chuck 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
through. Reverses bearing in chuck and drills through center of
beraing from other side until holes meet.
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