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DOT Code: 770.684-018

Industry: clock & watch
Alternate Titles: jewel-hole rough opener

Opens (enlarges) holes in jewels by drawing tapered wire through holes by hand: Strings inch-long row of jewels on wire. Inserts row in space between holders in center of holding tool and pulls wire back and forth through center openings to wear away inside diameter. Applies diamond dust to wire to act as abrasive and speed enlarging. Unwinds tapered wire gradually from spool and feeds larger portion of wire through jewels as opening operation proceeds.

GOE: 06.02.30 STRENGTH: L GED: R2 M1 L1 SVP: 2 DLU: 77