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Glossary of watchmaking

Balance

Balancier | テンプ | 摆轮

Balance

A circular, moving part which oscillates on its rotational axis. It is coupled to the balance-spring which gives it the to-and-fro motion through which it divides time into strictly equal parts. Each to-and-fro movement ("tick-tock") is called an oscillation, and each oscillation comprises Two vibrations.

A circular mass (rim) held by spokes. Combined with the spiral it forms the regulating organ of the watch.