Kugg

Kugg is a Swedish term used in mechanical engineering to denote a single tooth of a gear, or a cog. It is a component of a gear wheel, with the whole wheel typically referred to as kugghjul. In Swedish technical literature, kugg describes how each tooth interfaces with the corresponding tooth on a mating gear to transfer rotation and torque in a gear train.

The geometry of a kugg—its profile, width, and height—plays a central role in determining how smoothly gears mesh, how efficiently power is transmitted, and how much wear or noise arises during operation. Discussions of gear design, tooth profiles, backlash, and load capacity often reference individual kugg features to explain overall gear performance.

In practice, the term is primarily used within Swedish-language mechanical engineering and manufacturing contexts. When translating to English, the corresponding concept is usually called a tooth or cog. The Swedish word kugg may also appear in technical manuals, textbooks, and catalog descriptions produced in Sweden and other Nordic regions.

Because kugg is a language-specific term, readers outside Swedish-speaking engineering communities may encounter it mainly in translations or in multinational documentation that preserves original Swedish terminology. If you encountered the term in a particular text, the surrounding discussion about gear geometry and meshing will usually indicate that it refers to a tooth of a gear rather than a separate object or concept.