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Glossary of watchmaking

Barrel arbor

Arbre de barillet | 香箱真/コウバコシン | 发条匣轴

Barrel arbor

Supports the barrel and its spring. It comprises a cylinder, known as the core, and a hook to which the inner end of the mainspring is attached. The upper pivot is cut into a square for the ratchet-wheel. The arbor moves in holes, One in the plate and the other in the barrel bridge.