Zähnezahl

Zähnezahl refers to the number of teeth on a gear or a toothed component. This quantity is a fundamental parameter in gear design and plays a crucial role in determining the functional characteristics of a gear train. The ratio of the Zähnezahl of two meshing gears directly dictates their speed reduction or increase and their torque multiplication. For example, if a driving gear with 20 teeth meshes with a driven gear with 40 teeth, the driven gear will rotate at half the speed of the driving gear and transmit twice the torque.

The Zähnezahl influences various aspects of gear performance, including the module, which is a measure of the size of a gear tooth, and the pressure angle, which affects the force distribution between meshing teeth. A higher Zähnezahl generally allows for a larger module, which can lead to stronger teeth and greater load-carrying capacity. It also affects the smoothness of operation and the generation of noise. Different types of gears, such as spur gears, helical gears, and bevel gears, all utilize Zähnezahl as a key design parameter. The precise calculation and selection of Zähnezahl are essential for achieving the desired mechanical advantage, efficiency, and durability in any application involving gears.