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Operate drill presses to countersink drilled holes in watch parts.

What does a Countersinker do?

Operates vertical- or horizontal-drill press to countersink drilled holes in watch parts: Places part in bed or chuck of press. Aligns countersinking bit and hole, using loupe, and advances bit manually to automatic stop device. Removes part from press and measures depth of countersink, using precision dial gauge. May countersink screw holes around periphery of balance wheels and be designated Countersinker, Balance Screw Hole.

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