Mastering the Bergeon Lathe

When servicing rare vintage pocket watches or obsolete calibers, replacement parts are often impossible to procure.

Operating a 7mm precision watchmaker lathe demands extreme tactile sensitivity. Turning a balance staff pivot down to 0.08mm requires hand-gravers made from carbide or high-speed steel.

This article documents step-by-step measurements, burnishing techniques with tungsten carbide wheels, and final heat treatment process.