CALIPER
Vernier caliper
Dial caliper
Digital dial caliper
What is a caliper?
The caliper, sometimes called a sliding gauge, is a measuring instrument used in watchmaking to accurately determine the external, internal dimensions and depths of components and mechanisms.
Function and use
In watchmaking, where dimensional tolerances are often very tight, the caliper allows for measuring parts with precision surpassing that of traditional rulers. It is used to check the width, diameter, thickness, or depth of components, tools, and more.
Characteristics
- Material: Usually made of stainless steel, providing robustness, durability, and corrosion resistance.
- Graduations: Depending on the model, the graduations can be analog (with a vernier scale), or an analog or digital dial, typically offering precision up to one hundredth of a millimeter.
- Main Parts: It includes two sliding jaws — one fixed and one movable — for external measurements, along with specific jaws for internal measurement and a rod for depth measurement.
- Dimensions: Compact models, adapted to the size of watch components, are preferred for ease of handling in the workshop.
Importance in watchmaking
The caliper is an essential tool for ensuring the quality and conformity of parts inside watches. It allows for checking tolerances that are crucial to guarantee the proper functioning and longevity of the watch mechanism. Alongside other instruments like metal rulers and micrometers, it contributes to the precision and finesse of watchmaking work.