nyomásszög

Nyomásszög refers to the angle of contact between a gear tooth and its mating gear tooth during engagement and disengagement. This angle is crucial in determining the efficiency and smooth operation of a gear system. It's primarily influenced by the design of the gear teeth, specifically their profile and the pitch from which they are generated. A common term associated with nyomásszög is the pressure angle, which is the angle between the line of action and the common tangent to the pitch circles at the pitch point. A typical pressure angle for standard gears is 20 degrees, although 14.5 degrees and 25 degrees are also used in specific applications. A higher pressure angle generally leads to stronger teeth and a reduced tendency for undercutting, but it can also result in higher bearing loads and friction. Conversely, a lower pressure angle can reduce bearing loads but may result in weaker teeth and increased susceptibility to undercutting, especially in gears with a small number of teeth. The correct selection of the nyomásszög is a critical consideration in gear design to ensure optimal performance, durability, and minimal noise.