Guettes

Guettes is a term that can refer to several things, primarily within the context of watchmaking and fine mechanics. Most commonly, it refers to a type of jewel bearing used in precision instruments, particularly watches. These guettes, often made of synthetic ruby or sapphire, are small, precisely shaped components that reduce friction and wear on rotating parts. They are typically inserted into the plates or bridges of a watch movement.

In a broader mechanical sense, the word "guette" can also describe a small pin or stud that serves as a locating or stopping element. This usage is less common than its application in horology but can be found in various mechanical assemblies where precise positioning or limiting movement is required. The material and specific design of these mechanical guettes can vary depending on their intended function and the environment in which they operate.

Historically, the term has also been associated with a type of small, sharp point or projection used in certain tools or mechanisms, though this meaning is largely archaic. The primary association of "guette" today remains with the jewel bearings found in watches and other high-precision mechanical devices, where their role is crucial for accuracy and longevity.