Glossary of watchmaking - Fondation de la Haute Horlogerie

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Balance spring

Spiral | ヒゲゼンマイ | 摆轮游丝

A very fine spring and the "heart" of a mechanical watch. Its ends are affixed to the balance and...

Bar

Bar | バール | 巴

Unit of measure to indicate a watch's water-resistance, specifically its capacity to resist...

Barrel

Barillet | 香箱／コウバコ | 发条匣

A cylindrical box (the barrel) and toothed disc (wheel), protected by a cover. The barrel, which...

Barrel arbor

Arbre de barillet | 香箱真／コウバコシン | 发条匣轴

Supports the barrel and its spring. It comprises a cylinder, known as the core, and a hook to which...

Basic Function

Fonction de base | 基本機能／キホンキノウ | 基本功能

Indication of the hours, minutes and seconds using any type of display.

Bassiner

Bassiner | バシネ | 雕琢(法语：Bassiner)

French verb. To give a bassine form to a watch by chiselling the case back into a smooth, round...

Battery

Pile | 電池／デンチ | 电池

A device that transform the energy created by a chemical reaction into electrical energy....

Bearing

Coussinet | 軸受け／ジクウケ | 轴承

A hole made directly in the brass plate and in which a steel pivot, part of the greatrain or...

Bell

Timbre | ベル | 响铃

A small, flattened bell in a clock, watch or alarm that is struck with a hammer. In a...

Bench

Établi | ベンチ | 工作台

A general term for a solid workbench used by various professions. The watchmaker's bench includes...

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