THE DRILL
The pillar drill is standard equipment in watchmaking and Micromechanics workshops. It consists of a vertical frame carrying a motorized spindle, a height-adjustable table, and a spindle descent system with controlled travel. Compared to a hand-held drill, it guarantees perfect perpendicularity between the Axis of the Drill bit and the plane of the workpiece — an essential condition for drilling pivot holes, jewel holes, and Screw in plates and bridges. Precision watchmaking drills allow feed depths accurate to a hundredth of a millimeter and incorporate tilting tables for oblique drilling. In series production, multi-axis machining centers have largely replaced the drill for most drilling operations. However, the pillar drill remains irreplaceable for touch-ups, small series, and restoration work on old movements requiring precision and manual intervention.
Figure 1
“Sensitive” pillar drill
Click on the thumbnail to enlarge it
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